Question

9. Simplify (4x – 2y)2 – (4x + 2y)2
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Answer 1

Answer:

(4x-2y)²-(4x+2y)²

(16x²+4y²-16xy)-(16x²+4y²+16xy)

16x²+4y²-16xy-16x²-4y²-16xy

-16xy-16xy (by cancelled all)

-32xy

Step-by-step explanation:

Answer 2

Answer:

-32xy

Step-by-step explanation:

[(4x+2y)^2]=

(4x)^2+(2y)^2+2(4x)(2y)

=16x^2+4y^2+16xy

[4x-2y]^2=

(4x)^2+(2y)^2-2(4x)(2y)

=16x^2+4y^2-16xy

16x^2+4y^2+16xy -

16x^2+4y^2-16xy

=-16xy-16xy

=-32xy