SOLUTION: solve x^2+2x-6=3

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Question 2736: solve
x^2+2x-6=3
Answer by xcentaur(357) About Me  (Show Source):
You can put this solution on YOUR website!
x%5E2%2B2x-6=3


x%5E2%2B2x-6-3=0


x%5E2%2B2x-9=0


Compare to ax^2+bx+c=0
We get:
a=1
b=2
c=-9


Using the formula,
x+=+%28-b+%2B-+sqrt%28+b%5E2-4%2Aa%2Ac+%29%29%2F%282%2Aa%29+


x+=+%28-2+%2B-+sqrt%28+2%5E2-4%2A1%2A-9+%29%29%2F%282%2A1%29+


x+=+%28-2+%2B-+sqrt%28+4%2B36+%29%29%2F%282%29+


Root of 40 = 6.3245 = 6.325
Now value of x will be,
x=(-2+6.325)/2 AND (-2-6.325)/2
x=2.1625 AND -0.1754


Solution set={2.163,-0.175}


Hope this helps,
Best of luck.