Q: 2x2 plus 6x-8 equals 72

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Minus 61 (-61)

72 + 72 = 144

150% equals 72 plus 1/2 of 72. 1/2 of 72 equals 36. 72 plus 32 equals 104. 150% equals 104.

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49 + 72 + 68 = 189

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

72

132

72 !

48

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