Question

Factorise x3-12x-16=0

Answer 1

Answer:

Hint: x=2 is a solution of the polynomial. So x3−12x+16 is divisible by (x−2). And x3−12x+16=(x−2)(x2+2x−8). The roots of x3−12x+16=0 are x=2 and the roots of x2+2x−8=0