Question

Solving a quadratic equation 9xsquare-3x-20

Answer 1

9x² - 3x - 20                                                  product(the coefficient of the first term by the constant) = 180

                                                                      sum (coefficient of x) = 3

∴ by splitting middle term method,

9x² - (15x + 12x) - 20

9x² - 15x +12x -20

3x (3x - 5) + 4 (3x - 5)

(3x +4) (3x - 5)

3x + 4 = 0 or 3x -5 = 0

3x = -4 or 3x = 5

∴ x = -4/3 or x = 5/3

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Answer 2

please mark it as brainliest