SOLUTION: Use the Quadratic Formula to solve the equation. -2x2 - 5x + 5 = 0

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Question 668957: Use the Quadratic Formula to solve the equation.
-2x2 - 5x + 5 = 0
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
-2x%5E2+-+5x+%2B+5+=+0

2x%5E2+%2B+5x+-+5+=+0

Use the quadratic formula to solve for x

x+=+%28-b%2B-sqrt%28b%5E2-4ac%29%29%2F%282a%29

x+=+%28-%285%29%2B-sqrt%28%285%29%5E2-4%282%29%28-5%29%29%29%2F%282%282%29%29

x+=+%28-5%2B-sqrt%2825-%28-40%29%29%29%2F%284%29

x+=+%28-5%2B-sqrt%2825%2B40%29%29%2F%284%29

x+=+%28-5%2B-sqrt%2865%29%29%2F4

x+=+%28-5%2Bsqrt%2865%29%29%2F4 or x+=+%28-5-sqrt%2865%29%29%2F4

So the exact solutions are x+=+%28-5%2Bsqrt%2865%29%29%2F4 or x+=+%28-5-sqrt%2865%29%29%2F4