SOLUTION: Can anyone help? Thank you so much Solve x squar+3x+3=0 by using the Quadratic Formula (eg. 6, I) I use College Algebra Book ISBN-13 978-0-618-77629-0

Algebra ->  Equations -> SOLUTION: Can anyone help? Thank you so much Solve x squar+3x+3=0 by using the Quadratic Formula (eg. 6, I) I use College Algebra Book ISBN-13 978-0-618-77629-0      Log On


   

Question 145457: Can anyone help? Thank you so much
Solve x squar+3x+3=0 by using the Quadratic Formula (eg. 6, I)
I use College Algebra Book ISBN-13 978-0-618-77629-0
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
x%5E2+%2B+3x+%2B+3+=+0
When the equation is in the form ax%5E2+%2B+bx+%2B+c,
the roots are given by the formula:
x+=+%28-b+%2B-+sqrt%28+b%5E2-4%2Aa%2Ac+%29%29%2F%282%2Aa%29+
a = 1
b = 3
c = 3
x+=+%28-3+%2B-+sqrt%28+3%5E2-4%2A1%2A3+%29%29%2F%282%2A1%29+
x+=+%28-3+%2B-+sqrt%28+9+-+12+%29%29%2F2+
x+=+%28-3+%2B-+sqrt%28+-3+%29%29%2F2+
x+=+%28-3+%2B+sqrt%283%29%2Ai%29%2F2
x+=+%28-3+-+sqrt%283%29%2Ai%29%2F2
The roots are imaginary. If you plug one of these solutions
back into the equation, you should get 0