Question

Factorise 9x^2 - 144​

Answer 1

Answer:

9(x - 4) (x + 4)

Step-by-step explanation:

$9 {x}^{2} - 144 \\ = {(3x)}^{2} - {12}^{2}$

According to the formula,

${x}^{2} - {y}^{2} = (x + y)(x - y) \\ = (3x - 12)(3x + 12) \\ = 3(x - 4) \times 3(x + 4) \\ = 9(x - 4)(x + 4)$

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Answer 2

Answer:

(3x-12) (3x+12) xkkk hmmmk to aap hi