SOLUTION: Find the exact solution of the following quadratic equation by using the Quadratic Equation. 4x^2+7=9x

Algebra ->  Quadratic Equations and Parabolas  -> Quadratic Equations Lessons  -> Quadratic Equation Lesson -> SOLUTION: Find the exact solution of the following quadratic equation by using the Quadratic Equation. 4x^2+7=9x      Log On


   

Question 624240: Find the exact solution of the following quadratic equation by using the Quadratic Equation. 4x^2+7=9x
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi,

using the Quadratic Equation. 

4x^2+7=9x

  4x^2 -9x + 7 = 0   | Note:  format y = ax^2 + bx + c

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

x+=+%289+%2B-+sqrt%28+%28-9%29%5E2-4%2A4%2A7+%29%29%2F%288%29+ 

x+=+%289+%2B-+sqrt%28+-31+%29%29%2F%288%29+

x+=+%289+%2B-+i%2Asqrt%2831%29%29%2F%288%29+