Question

factorise
16a²-144b^2
​

Answer 1

(4a+12b)(4a-12b)

Answer:

$16a^2-144b^2\\= 16a^2+9\cdot \:16b^2\\= 16\left(a^2-9b^2\right)\\= 16\left(a+3b\right)\left(a-3b\right)$

OR

16a²- 144b²

=(4a)² - (12b)²

= (4a + 12b)(4a - 12b)

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Answer 2

Answer:

16a²- 144b²

(4a)² - (12b)²

[using identity (a+b)(a-b) = a²- b²]

(4a+12b)(4a-12b)