Question

Find the roots by factorisation xsquare-17x+72=0​

Answer 1

x^2 - 17x + 72 = 0

x^2 - 9x - 8x + 72 = 0

x(x-9) -8(x-9) = 0

(x-9)(x-8) = 0

=> x-9 = 0 or x-8 =0

=> x = 9 or. x = 8

Thus, roots of given equation are x = 8 and x = 9.