SOLUTION: 4x^2=324 what is the discriminant value of this equation and how many and what types of roots are there and what are the solutions for this quadratic

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Question 667680: 4x^2=324 what is the discriminant value of this equation and how many and what types of roots are there and what are the solutions for this quadratic
Answer by mananth(16946) About Me  (Show Source):
You can put this solution on YOUR website!
4x%5E2=324+

Write the equation in standard form

D= 16*324
d=5184
d>0 so the roots are real
x1=+%28-b%2Bsqrt%28b%5E2-4ac%29%29%2F2a
= (0+72)/8
=9
x2=+%28-b-sqrt%28b%5E2-4ac%29%29%2F2a

x2= (0-72)/8
-9
+9 & -9 are the roots of the equation