Question

i) Factorise 144a^2 - 121b^2​

Answer 1

Factorise 144a^2 - 121b^2​

= 12^2 a^2 - 11^2 b^2

= (12a + 11b)(12a - 11b)

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Answer 2

Answer:

answer

(12a + 11b) (12a-11b)

Step-by-step explanation:

we know,

(a+b) (a-b) = a² - b²

so,

(√a² + √b²) (√a² - √b²)

then,

(√144a² + √121b²) (√144a² - √121b²)

therefore,

answer is (12a + 11b) (12a-11b)