0
X2 - 12X = 8
X2 - 12X - 8 = 0
Looks like a job for the quadratic formula.
X = - b (+/-) sqrt(b2 - 4ac)/2a
a = 1
b = -12
c = - 8
X = - (- 12) (+/-) sqrt[(- 12)2 - 4(1)(- 8)]/2(1)
X = 12 (+/-) sqrt(144 + 32)/2
X = 12 (+/-) sqrt(176)/2
X = [12 (+/-) 4sqrt(11)]/2
=======================exact answer, less factor elimination. you do approximation.
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Earn +20 ptsQ: What is the solution of the equation x square -12x equals 8?
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