Question

factorise this ......step by step explanation

Answer 1

Answer:

Step-by-step explanation:

(5(a-b))²- c²

(5a-5b+c)(5a-5b-c)

Answer 2

let x = 5(a-b)

let y = c

x^2-y^2= [5(a-b)]^2 - c^2

=> [5a-5b]^2 - c^2

[IDENTITY- x^2-y^2= (x+y)(x- y)]

=> (5a -5b +c)(5a- 5b -c)