Question

simplify (7x+4y) ²+(7x-4y) ² using indenities​

Answer 1

Answer:

cannot be done because it is + is it was X I could have answered

Answer 2

Answer:

Step-by-step explanation:

(7x+4y)²-(7y-4y)²

={(7x)^2 +(4y)^2 +2*7x*4y)} -

{(7x)^2+(4y)^2-2*7x*4y)}

={49x^2 +16y^2 +56xy -49x^2 -16y^2 +56xy}

=112xy