Question

factorise 16 x to the power 5 - 81x​

Answer 1

Answer: 16x^5-81x

=x (16x^4-81)

=x{(4x^2)^2-(9)^2}

=x (4x^2+9) (4x^2-9)

=x (4x^2+9) {(2x)^2-(3)^2}

=x(2x+3) (2x-3) (4x^2+9)

Step-by-step explanation: