Question

(a-b)^2=a^2-2ab+b^2​

Answer 1

Answer:

i) (a+b)²=a²+2ab+b²

ii) (a-b)²=a²-2ab+b²

iii) a²-b²=(a+b) (a-b)

iv) (x+a) (x+b) =x²+(a+b)x+ab

Answer 2

Answer:

so what to do with this formulae