Question

1 One of the factors of x-15x+56 is
X+7
X-8​

Answer 1

given quadratic equation is x²- 15x + 56 = 0

solution:-

x² - 15x + 56 = 0

=> x² -7x -8x + 56 = 0

=> x(x-7) - 8(x-7) = 0

taking (x-7) common..

=> (x-7)(x-8) = 0

=> (x - 7) and (x - 8) Are the two factors of given quadratic equation

and

x = 7 , 8 are the roots of equation