0
Anonymous
2x2+6x-8 = 72
2x2+6x-8-72 = 0
2x2+6x-80 = 0
(2x-10)(x+8) = 0
Wiki User
72 + 72 = 144
180+72=252
72+30=102
72
132
Minus 61 (-61)
2x2 + 6x - 8 = 72 ∴ 2x2 + 6x + 64 =0 ∴ x2 + 3x + 32 = 0 This can not be factored, as x is not equal to any integer. Using the quadratic equation, we find that: x = -3/2 ± √119 / 2i
49 + 72 + 68 = 189
You would formulate this problem X/100 * 150 = 72 and solve for X.
72 !
2x2 - 72 would be factored into (2x - 12)(x + 6) or (2x + 12)(x - 6) To double check, multiply each pair: (2x - 12)(x + 6) = 2x2 + 12x - 12x - 72 = 2x2 - 72 (2x + 12)(x - 6) = 2x2 - 12x + 12 x - 72 = 2x2 - 72
It is the property of n as the additive identity.