SOLUTION: find the x-intercept: -2x^2-16x+24

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Question 346099: find the x-intercept: -2x^2-16x+24
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
-2x%5E2-16x%2B24=0
x%5E2%2B8x-12=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%2A%28-12%29+%29%29%2F%282%2A1%29+
x+=+%28-8+%2B-+sqrt%28+64%2B48+%29%29%2F2+
x+=+%28-8+%2B-+sqrt%28+112+%29%29%2F2+
x+=+%28-8+%2B-+4sqrt%28+7+%29%29%2F2+
highlight%28x+=+-4+%2B-+2sqrt%28+7+%29%29%29+
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graph%28300%2C300%2C-10%2C10%2C-10%2C10%2C-2x%5E2-16x%2B24%29