Question

factorise : 81 x²-64​

Answer 1

$\huge\mathfrak\pink{hola}$

$81x{^2} - 64$

$(9x) {^2} - (8) {^2}$

$(9x-8) (9x+8)$

Answer 2

Answer:

(9x+8)(9x-8)

Step-by-step explanation:

Factorize 81 x²-64​ using "Factoring the Difference of Two Squares"

1. Get the square root of each of the two squares

Square root of 81x² is 9x

Square root of 64 is 8

2. Using the two square roots which is the 9x and 8, form the sum (9x+8), and the difference (9x-8).

Thus, 81 x²-64​ is equals to (9x+8)(9x-8)