1.

31. Factorize:4(i) (x4 -81)(iv)(a - b)? -(a-b) 1.023​

Answer»

1) (x^2)^2-9^2

By USING the identity:a^2-b^2=(a+b)(a-b)

(x^2-9)(x^2+9)

The underlined TEXT can be further solved using the same identity

(x^2-3^2)(x^2+9)

The ANSWER will be

(x-3)(x+3)(x^2+9)

2)(a-b)(a+b)=a^2-b^2


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