SOLUTION: Use the quadratic formula to solve x2 + 8x + 9 = 0. Estimate irrational solutions to the nearest tenth.

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Question 372514: Use the quadratic formula to solve x2 + 8x + 9 = 0.
Estimate irrational solutions to the nearest tenth.
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
x%5E2+%2B+8x+%2B+9+=+0
Use the quadratic formula,
x+=+%28-b+%2B-+sqrt%28+b%5E2-4%2Aa%2Ac+%29%29%2F%282%2Aa%29+
x+=+%28-8+%2B-+sqrt%28+8%5E2-4%2A1%2A9+%29%29%2F%282%2A1%29+
x+=+%28-8+%2B-+sqrt%28+64-36+%29%29%2F2+
x+=+%28-8+%2B-+sqrt%28+28+%29%29%2F2+
x+=+%28-8+%2B-+2%2Asqrt%28+7+%29%29%2F2+
highlight%28x+=+-4+%2B-+sqrt%28+7+%29%29+
Time to get out the calculator for the estimating.