Question

a). (7p - 6q) (7p + 6q)
b). (2xy + 7yz) (2xy + 7yz)​

Answer 1

a)

$(7p)^{2} - (6q)^{2} \\ = 49p^{2} - 36q {}^{2}$

Answer 2

Step-by-step explanation:

a) (7p-6q)(7p+6q)

identity=a²-b²=(a+b)(a-b)

answer=(7p)²-(6q)²

=49p²-36q²

b) (2xy+7yz)(2xy+7yz)

identity=(2xy+7yz)²

answer=(2xy)²+(7yz)²+2×2xy×7yz

=4x²y²+49y²z²+28xy²z

here are the answers, please mark me as brainliest