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9x^3 + 45x^2 - 4x -20 ; x+5 synthetic division

Sagot :

                    9x² + 0x - 4
x + 5|9x³ + 45x² - 4x - 20
         9x³ + 45x²              
                           -4x - 20
                           -4x - 20
                                     0
The answer is equal to 9x² - 4.