a2+321a-51= (a+- what)* (a+- what) foil?
597401
a^2 + 321 a - 51 = ( a - 0.158799954)*(a + 321.158799954)\nUsing the general law for solving a quadratic equation.
880711
sin(2A)=sin(A+A)=sinAcosA + sinAcosA=2sinAcosA
1178018
This may be useful:\n\nAlt + 160 = á\nAlt + 130 = é\nAlt + 161 = í\nAlt + 162 = ó\nAlt + 163 = ú\nAlt + 164 = ñ\nAlt + 165 = Ñ\nAlt + 129 = ü
171163
a + 18 > -3\na + 18 - 18 > -3 - 18 (Subtracting 18 from both sides)\na > -21\na= ] -21 , inf [
742973
FOIL Method\n\n(5k + 2)(2k - 3) = 10k² - 15k + 4k - 6 = 10k² - 11k - 6\n\nF = 2k x 5k = 10k²\n\nO = 5k x -3 = - 15k\n\nI = 2 x 2k = 4k\n\nL = -3 x 2 = - 6\n\n\nThe answer is 10k² - 11k - 6\n\n\n- - - - - s-
937737
3a2(a-b) -6a(a-b) +21(a-b)\n(a-b)(3a^2-6a+21)\n3(a-b)(a^2-2a+7)
757549
A (alt + 0178) would say A²
584142
To simplify radical rational expressions, multiply top and botom by the conjugate of the bottom.  This is found by switching the operation from + to - or - to +.  This will eliminate the radical on the bottom becaise of the way "FOIL" works.  Here, multiply by sqrt(3)-2 over sqrt(3)-2:\n\n\nTop: (sqrt(3)-5)(sqrt(3)-2)\n= 3 - 7sqrt(3) + 10 \n= 13 - 7sqrt(3)\n\nBottom: (sqrt(3)+2)(sqrt(3)-2) \n= 3 - 2sqrt(3) + 2 sqrt(3) - 4\n= 3 - 4\n= -1\n\nAnswer: (13 - 7sqrt(3))/-1, or -13 + 7sqrt(3)
21689
A - sign outside (  ) changes all the signs inside the (  ). \nn^2   -3n   +1 \n-4n^2  -n  +5   Stacking the values in columns helps combine the 'like' terms, which have the same letter(s) to the same power(s)\n\n-3n^2 -4n +6
737340
Z = 13    A = 27    The chemical symbol is Al.\nThe sum of the superscripts on the left side of the arrow must equal the sum of the superscripts on the right side of the arrow.  The same is true for the subscripts.  Adding 4 + 26 = 30 for the superscripts on the left, so 27 must be the unknown mass number (A).  Adding 2 + 12 = 14 for the subscripts on the left, 13 must be the missing atomic number on the right (Z).  Z tells you the element, which is aluminum.
862170
I'm sorry but your answer is wrong...let's review some basics. \n\nYou should know that, when multiplying 2 numbers: \n\npositive x positive = positive answer\nnegative x negative = negative answer\npositive x negative =  negative answer\n\nAlso, the FOIL rule is: \n\nFirst ("first" terms of each binomial are multiplied together) \nOuter ("outer" terms multiplied) \nInner ("inner" terms multiplied) \nLast ("last" terms multiplied) \n\nThe answer is then the sum of the terms obtained. Thus the general form is\n\n(a + b)(c + d) = ac (first) + ad (outer) + bc (inner)+ bd (last)\n\nWith this in mind, you can work out the problem: \n(4x + 5)(x + 1) = 4x(x) + 4x(1) + 5(x) + 5(1) = \n\n4x^2 + 9x + 5 is the Answer \n\nGood luck and practice! ;-)
954003
it is from a logic work sheet.  directions are find the next item in the pattern.  examples:  12321, 23432, 34543, 45654\na, z, b, y, c, x, d\ntam, tan, rib, rid, rat, raw, hip
248130
Take a piece of foil like aluminum foil and fold it over once, then again, and again, and again, and once more (5 times). Press it flat each time, or cut off the folded end .  You should then be able to measure this stack with a ruler, and divide by 32 (that is 2^5) to get the thickness of the foil.
972642
(A^2+2ab+b^2)/(a+b) + (a^2-b^2)/(a-b) + (a-b)/(a+b)/(a^2-b^2)/a+b)\n(a+b)^2/(a+b)+(a+b)(a-b)/(a-b)+ (a-b)/(a+b)*(a+b)/(a^2-b^2)\na+b+a+b+(a-b)/((a+b)(a-b))\n2a+2b+1/(a-b)\n\nif I got all the ( ) in the right places.
791300
Use the FOIL method; First, Outer, Inner, Last.\n\nFirst, n * n\n\nOuter, n * 5\n\nInner, n * 7\n\nLast 7 * 5.\n\nThen add them all together.\n\n22 NOV 06, 0420 hrs, GMT.
10610
X^2-9X+18\n\nShort and simple just factor it FOIL
61276
100101111\nThat is:\n256+32+8+4+2+1