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Presley Shelton
Mathematics
22 September, 00:43
X (x+7) = 4 (6+4) solve for x
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Ashleigh
22 September, 01:01
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X (x+7) = 4 (6+4)
x^2 + 7x = 24 + 16
x^2 + 7x - 40 = 0
a=1 b=7 c=-40
Using the quadratic formula:
x = [-7 + - sq root (49 - 4*1*-40) ] / 2*1
x = [-7 + - sq root (209) ] / 2
x1 = [-7 + 14.4568322948] / 2
x1 = 3.7284161474
x2 = [-7 - 14.4568322948] / 2
x2 = - 10.7284161474
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