SOLUTION: Use discriminant to determine the nature of the roots ...do not solve equation. help! 10x^2 + 2 = 21 Thanks!

Algebra ->  Quadratic Equations and Parabolas -> SOLUTION: Use discriminant to determine the nature of the roots ...do not solve equation. help! 10x^2 + 2 = 21 Thanks!      Log On


   

Question 56174: Use discriminant to determine the nature of the roots ...do not solve equation.
help!
10x^2 + 2 = 21
Thanks!
Answer by Cintchr(481) About Me  (Show Source):
You can put this solution on YOUR website!
+10x%5E2+%2B+2+=+21+
Get everything to one side of the equation
+10x%5E2+%2B0x+-19+=+0+
Use the discriminant ...
+sqrt%28+b%5E2-4%2Aa%2Ac+%29+
A = 10
B = 0
C = -19
+sqrt%28+0%5E2-4%2A%2810%29%2A%28-19%29+%29+
multiply
+sqrt%28+0%5E2-40%2A-19+%29+
+sqrt%28760%29+
+2sqrt%28190%29+