what is the answer to this equation: 8(x+4)squared= 9?
962705
8(x+4)² = 9\n(x+4)² = 9/8\nx+4 = ±√(9)/√8\nx+4 = ±3/√8\nx+4 = ±(3√2)/4\nx = -4 ± (3/4)√2\n\nso no, you're a little mixed up on simplifying the radical.\n\na/√b = (a/b)√b, or simply 1/√b = b/√b
930990
-9x = 81x²   ≡   81x² + 9x + 0 = 0\nFor cuadratics with the form ax² + bx + c = 0 use this formule:\n\nx = [-b± √(b²- 4ac)] / (2a)\n\nso:\n\nx = [-9 ± √(9² - 4(81)(0))] / (2(81))\nx = [-9 ± √(9²)] / 162\nx = [-9 ± 9] / 162\n\nx = a = 0\nx = b = -18 / 162 = -9 / 81 = -1 / 9\n\nsubstitute and confirm it 0 = 0 for both a and b answers.
729543
-24+w+8=4\n-24+24+w+8-8=4+24-8\nw=20\n\nhope this helps!
20188
The formula has been given.  For further clarification, you have two equations and two unknowns.  Solve for one of the equation and use it to solve for the other one.  \n\nHint:\n81 = LW\n36 = 2L + 2W\n\n18 = L + W\nL = 18 - W.\n\nNow, use this formula:\n81 = LW\n81 = (18-W)*W\n81 = 18W - W^2\n\nRearrange and you have a quadratic equation:\nW^2 -18W + 81 = 0.\n\nSolve for W.\nW=9.\n\nThen plug into the formula\n18=L+W\n18 = L + 9\nL=9\n\nThat's the hard way, but it works.  You can use inductive reasoning to solve it also, but that's hard to explain (at least for me).\n\nHope it helps!
191747
I have eight answers\n\n888 + 88 + 8 + 8 + 8 = 1000\n\n(8888 - 888) / 8 = 1000\n\n(8888 - 88) / 8.8 = 1000\n\n(8888 - 8) / 8.88 = 1000\n\n8 x [(8x8) + (8x8)] - (8+8+8) = 1000\n\n8 x [(8+8)x8 - (8+8+8)/8] = 1000\n\n[(88-8)/8] ^ [(8+8+8)/8] = 1000\n\n[8 + (8+8)/8] ^ [(8+8+8)/8] = 1000\n\nThose were 8 answers but if it not enough i can give you the 9th which is very silly\n\n[8/8] [8-8] [8-8] [8-8] = [1] [0] [0] [0] = 1000
839343
x^2 + 4x + 4 = 7 (subtrat 7 from both sides)\n\nx^2 + 4x -3 = 0 (use the quadratic equation formula)\n\n-b + or - the square root of (b^2 - 4ac) / a^2\n\n-4 + or - the square root of 16 - (4) (1) (-3) / 2\n\n-4 + or - the square root of 28 / 2\n\n-4 + or - (the square root of 4) (the square root of 7) / 2\n\n-4 + or - 2 (the square root of 7) / 2 (simplify by dividing 2 into  the -4 and 2 on the top to get rid of the 2 on the bottom)\n\nthat gives you x = - 2 + or - the square root of 7.
221619
x-4x+9+3(-2+1)+2=0\nx-4x+9+3*(-1)+2=0\nx-4x+9-3+2=0\n-3x+8=0\n-3x=-8\nx=8/3\nThis is if the equation was x-4x+9=-3(-2+1)-2, but if it was just -4x+9 = -3(-2+1)-2 than the answer is 2 (-4x=-8    x=2).
866633
9x^2+18x+8=0\n\n(3x + 2)(3x + 4)=0\n3x+2=0\nx=-2/3\n3x+4=0\nx=-4/3
243121
first square two sides\nyou will get 3x+1 =9+6√(x-4)+x-4\n= (x-2)=6√(x-4)  square it \nyou will get x^2 -4x +4=9(x-4)\n=x^2 -13x + 40=0\nfactor  (x-5)(x-8)\nso x=5 or x=8
976644
x ^2 - x - 72 =0\nfactor 72\n8*9=72\ntherefore\nx^2 -9x+8x-72=0\nx(x-9)+8(x-9)=0\n(x-9)(x+8)=0\nx=9;-8
342699
Completing the square involves creating a perfect square trinomial.  Consider\n\nx^2 + 4x - 1 = 0\n\nCompleting the square would involve trying to make one side a perfect square: (x + 2)^2 in this case.  Step by step:\n\n1.  Get all your x terms on one side, and constants on the other.\n\nx^2 + 4x = 1\n\n2.  Take half of the coefficient of the x term and square it.  Half of 4 is 2, and 2 squared is 4.\n\n3.  Add this to both sides of the equation.\n\nx^2 + 4x +4 = 1 + 4\n\n4.  Now factor the left side.  It works out to be a perfect square.\n\n(x + 2)^2 = 5\n\n5.  Take the square root of both sides and solve for x.\n\nx + 2 = +/- sqrt(5)\n\nx = +/- sqrt(5) - 2\n\nThe quadratic equation is pretty easy:\n\nx = [-b +/- sqrt (b^2 - 4ac)] / 2a\n\nIn the above example, a = 1, b = 4, and c = -1 (coefficients of the x^2 and x terms are a and b, and the constant is c).  So plugging in to the quadratic formula gives you\n\nx = [-4 +/- sqrt(4^2 - 4x1x(-1))] / 2x1\n  = [-4 +/- sqrt(16 - (-4))] / 2\n  = [-4 +/- sqrt(20)] / 2\n  = [-4 +/- 2sqrt(5)] / 2\n  = -2 +/- sqrt(5)\n\nwhich is the same as we got via completing the square.
793181
sqrt(x+4)=3\nx+4=9\nx=9-4\nx=5\n\ns
1137313
=> 14x -8+5-9x=1-3x\n=> 14x-9x+3x=1+8-5\n=> 8x=4\n=> x=4/8=1/2=0.5\n\nCHEERS!
895342
x^2-9x-x+9=0\n(x-9)(x-1)=0\nx=9 or x=1
1104082
2(x-9)=x-(-8)\n2x-x-18=8\nx=26\n\n\n\nits  26
911592
Factorize!\n4x (x^2-9) = 0\n4x (x+3) (x-3)\n\nyour solution is \nX = 0\nx= -3\nx= 3
807939
= (1 + 8x)*(1 - 8x) = 1 - 64*x^2\n\nAnd what do you say?