SOLUTION: Solve using Quadratic Formula: 3x^2 + 2x =7 My text says the answer is -1 + sqrt 22 over 3 or -1 - sqrt 22 over 3 I dont see how they got sqrt 22

Algebra ->  Quadratic Equations and Parabolas  -> Quadratic Equations Lessons  -> Quadratic Equation Lesson -> SOLUTION: Solve using Quadratic Formula: 3x^2 + 2x =7 My text says the answer is -1 + sqrt 22 over 3 or -1 - sqrt 22 over 3 I dont see how they got sqrt 22      Log On


   

Question 399483: Solve using Quadratic Formula: 3x^2 + 2x =7
My text says the answer is -1 + sqrt 22 over 3 or -1 - sqrt 22 over 3
I dont see how they got sqrt 22
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!


Hi

Solving using Quadratic Formula: 

3x^2 + 2x =7

3x^2 + 2x -7=0

x+=+%28-b+%2B-+sqrt%28+b%5E2-4%2Aa%2Ac+%29%29%2F%282%2Aa%29+

x+=+%28-2+%2B-+sqrt%28+88+%29%29%2F%282%2A3%29+

x+=+%28-2+%2B-+sqrt%28+4%2A22+%29%29%2F%282%2A3%29+

x+=+%28-2+%2B-+2%2Asqrt%2822%29%29%2F%282%2A3%29+

x+=+%28-1+%2B-+1%2Asqrt%2822%29%29%2F%283%29+