Question

use suitable identities (5x-2)^2

Answer 1

Answer:

ans-4.58............

Answer 2

Answer:

(5x-2)^2 = (a-b)^2

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

Now, by substituting

a = 5x

b = 2

we will get,

(5x)^2 - 2(5x)(2) + 2^2

= 25x^2 - 20x + 4