Question

Factorize 5-20x^2 from RS Agarwal

Answer 1

we factorise this by taking out common factor

5-20x^2
5 (1-4x^2)
5 {(1)^2 -(2x)^2}
5(1+2x)(1-2x) answer

Answer 2

Answer is 5(1+2x)(1-2x)

Explanation

first take 5 as common

so,

5(1-4x^2)

5(1)^2-2x^2

This is property a^2-b^2

so,

5(1+2x)(1-2x)

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