SOLUTION: use quadratic formula to solve equation 0=x^2+x-20

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Question 108100: use quadratic formula to solve equation
0=x^2+x-20
Answer by checkley71(8403) About Me  (Show Source):
You can put this solution on YOUR website!
X^2+X-20=0
x+=+%28-b+%2B-+sqrt%28+b%5E2-4%2Aa%2Ac+%29%29%2F%282%2Aa%29+
X=(-1+-SQRT[1^2-4*1*-20])/281
X=(-1+-SQRT[1+80])/2
X=(-1+-SQRT81])/2
X=(-1+9)/2
X=8/2
X=4 ANSWER.
X=(-1-9)/2
X=-10/2
X=-5 ANSWER.