92=-2(x-4)^2+100

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1 Answer

92 = -2(x - 4)^2 + 100

92 = -2(x - 4)(x - 4) + 100

92 = -2(x^2 - 4x - 4x + 16) + 100

92 = -2x^2 + 16x - 32 + 100

-2x^2 + 16x - 24 = 0

using quadratic equation:

x = (-16 +/- SQR(256 - 4(-2)(-24)))/2(-2)

x = (-16 +/- 8)/-4

x = 2, 6
by Level 6 User (23.1k points)

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