Question

$25x2 - 40x + 16$
class 8 ch 14 factorization ​

Answer 1

Answer:

rewrite 25x^2 as ( 5x)^2

(5x)^2-40x+16

rewrite 16 as 4^2

(5x)^2-40x+4^2

check the middle term by multiplying 2ab and compare this result with the middle term in the original expression

2ab=2.(5x)^2 -4

simplify

2ab= -40x

factor using the perfect square trinomial rule

a^2 -2ab+b^2=(a-b)^2, where a= 5x and b= -4.

(5x-4)^2