Question

factorise 9x2 ─ 64

plz help me fast I will mark u as the brainliest​

Answer 1

Answer:

$9x^2 - 64 = (3x -8) (3x + 8)$

Step-by-step explanation:

Given: $9x^2 - 64$

Formula: $a^2 - b^2 = (a - b) (a + b)$

$9x^2 - 64$

put it in $a^2 - b^2 = (a - b) (a + b)$ form.

$9x^2 - 64\\= (3x)^2 - (8)^2\\= (3x -8) (3x + 8)$