SOLUTION: y=-2(x+1) sqaured +9

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Question 677714: y=-2(x+1) sqaured +9
Answer by ReadingBoosters(3246) About Me  (Show Source):
You can put this solution on YOUR website!
y = -2%28x%2B1%29%5E2+9
**(will have vertex of (-1,9))**
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y = -2(x+1)(x+1)+9
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y = -2(x%5E2%2B2x%2B1%29+9
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y = -2x%5E2-4x-2+9
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y = -2x%5E2+-+4x+%2B+7
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Using Quadratic Formula for x intercepts
y = -1%282x%5E2%2B4x-7%29
Divide both sides by -1
0 = 2x%5E2%2B4x-7
x = %28-4%2B-sqrt%28%284%29%5E2-4%282%29%28-7%29%29%29%2F%282%282%29%29
x = %28-4%2B-sqrt%2816%2B56%29%29%2F4
x = %28-4%2B-sqrt%2872%29%29%2F4
x = %28-4%2B-sqrt%289%2A4%2A2%29%29%2F4
x = %28-4%2B-3%2A2sqrt%282%29%29%2F4
x = %28-4%2B-6sqrt%282%29%29%2F4
x = -1 +/- %283sqrt%282%29%2F2%29
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highlight_green%28x+=+-1+%2B+%283sqrt%282%29%2F2%29%29%29
highlight_green%28x+=+-1+-+%283sqrt%282%29%2F2%29%29
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graph%28300%2C200%2C-5%2C5%2C-5%2C15%2C-2x%5E2-4x%2B7%29
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