SOLUTION: Solve x[squared]+5x+8=0

Algebra ->  Rational-functions -> SOLUTION: Solve x[squared]+5x+8=0      Log On


   

Question 69801: Solve x[squared]+5x+8=0
Answer by checkley75(3666) About Me  (Show Source):
You can put this solution on YOUR website!
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+
X=(-5+-SQRT[25-4*1*8])/2*1
X=(-5+-SQRT[25-32])/2
X=(-5+-SQRT-7)/2
X=(-5+-2.646i)/2
X=(-5+2.646i)/2
X=-5/2+2.646i
X=-2.5+1.323i ANSWER
X=-5/2-2.646i
X=-2.5-1.323i ANSWER