SOLUTION: (x(squared)-6x)=(1/2x+42)

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Question 355230: (x(squared)-6x)=(1/2x+42)
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
Hi,
.
solving
x^2 - 6x = (1/2)x + 42
.
mulitplying thru with 2
2x^2 - 12x = x + 84
.
set to zero to solve
2x^2 - 13x -84 = 0
.
using quadratic formaula to solve
x+=+%28-b+%2B-+sqrt%28+b%5E2-4%2Aa%2Ac+%29%29%2F%282%2Aa%29+
.
x+=+%2813+%2B-+sqrt%28+841%29%29%2F%284%29+
.
x+=+%2813+%2B-+29%29%2F%284%29+
.
x = 42/4 = 10.5
.
x = -16/4 = -4