Question

factorise 25a² - 70ab + 49b².​

Answer 1

Answer:

25a^2-70ab+49b^2

This equation is in the form of (a-b)^2

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

(5a)^2-2(5a)(7b)+(7b)^2

(5a-7b)^2

= ( 5a - 7b) ( 5a - 7b)

This is your answer. Hope it helps.

Answer 2

Answer :

25a^-70ab+49b^=0

25a^-35ab-35ab+49b^=0

5a(5a-7b)-7b(5a-7b)=0

(5a-7b) (5a-7b) =0

a=7b/5

b=5a/7