SOLUTION: Solve by using the quadratic formula. x^2 = –5x + 8 Is this right? My answer: 7+-√61/2 The middle between the 7 and √61 is suppose to be a plus sign over a minus

Algebra ->  Expressions-with-variables -> SOLUTION: Solve by using the quadratic formula. x^2 = –5x + 8 Is this right? My answer: 7+-√61/2 The middle between the 7 and √61 is suppose to be a plus sign over a minus      Log On


   

Question 83676: Solve by using the quadratic formula. x^2 = –5x + 8
Is this right?
My answer:
7+-√61/2
The middle between the 7 and √61 is suppose to be a plus sign over a minus sign.
Answer by checkley75(3666) About Me  (Show Source):
You can put this solution on YOUR website!
X^2=-5X+8
X^2+5X-8=0
USING THE QUADRATIC EQUATION x+=+%28-b+%2B-+sqrt%28+b%5E2-4%2Aa%2Ac+%29%29%2F%282%2Aa%29+
WE GET:
X=(-5+-SQRT[5^2-4*1*-8])/2*1
X=(-5+-SQRT[25+32])/2
X=(-5+-SQRT57)/2
X=(-5+-7.55)/2
X=(-5+7.55)/2
X=2.55/2
X=1.275 ANSWER.
X=(-5-7.55)/2
X=-12.55/2
X=-6.275 ANSWER.