Answers

  • Brainly User
2015-09-10T08:16:42+08:00
QUADRATIC EQUATION, ax² +bx + c = 0, where a≠0
3x²+20x-7 = 11+20(2x+3)

3x² + 20x -7 = 11+ 40x + 60
3x² + 20x - 7 = 40x +71
3x² + 20x -7 - 71 = 0
3x² + 20x - 78 = 0

Solve the equation using quadratic formula.  By finding its discriminant, this equation can not be factored.

a = 3;  b = 20;  c= -78



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