Question

Factorise 50a square+98b square+140ab

Answer 1

50a^2 + 140ab + 98b^2
= 2(25a^2 + 70ab + 49b^2) => (x + y)^2 = x^2 + 2xy + y^2:
= 2(5a + 7b)^2

Answer 2

50a^2 + 140ab + 98b^2
= 2(25a^2 + 70ab + 49b^2) => (x + y)^2 = x^2 + 2xy + y^2:
= 2(5a + 7b)^2

I hope this helps.