Question

Maths
) simplily using adentities
a)(4x+5y)²
b) 96^2
c)(5/7x+3/2y) (5/7x-3/2y)
​

Answer 1

Step-by-step explanation:

I will do 1st part for u rest will tell u the formula do it by ur self

1) (4x+5y)²

using formula (a+b) ²= a²+b²+2ab

= (4x)²+(5y)²+ 2(4x)(5y)

= 16x²+25y²+40xy

2) use formula (a-b) ²= a²+b²-2ab

as 96²= (100-4)²

3) use formula (a+b) (a-b) = a²-b²

here a = 5/7x and b = 3/2 y