Math, asked by wamandeshpande08, 5 months ago

Factorise the following algebraic expression by using suitable identity 4a²-b²+6b-9​

Answers

Answered by mohakbachchas
1

Answer:

by using identities

(a-b)²=a²-2ab+b²

and (a²-b²)=(a+b)(a-b)

4a²-b²+6b-9

4a²-(b²-6b+9)

(2a)²-(b²-(2)(3)(b)+3²)

(2a)²-(b-3)²

(2a-(b-3))(2a+(b-3))

(2a-b+3)(2a+b-3)

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