Question

Expand using the formula
(4x+2y+3)(4x+2y-3)
​

Answer 1

Answer:

16x²+16xy+4y² - 9

Step-by-step explanation:

Here ( 4x+2y+3 ) * ( 4x+2y-3 ) is given ,

By identities , ( a+b )*( a-b ) = a²-b²

let's compare with our Algebraic expression ,

so a be the , & b be the ,

a = 4x+2y b =3

so by our Algebraic expression ,

(4x+2y)² - (3)² -----------(i)

we know that (x+y)² = x²+2xy+y²

(4x+2y)²= 16x²+16xy+4y²

put this in equation (i) so it is ,

( 4x+2y+3 ) * ( 4x+2y-3 ) = 16x²+16xy+4y² - 9