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## Answers

*A. (2a+3)(2a+5)*

*= (2a)² + 3*5 + 2a(3+5)*

*=4a² + 15 + 16a*

*B. (3p-4q)(3p+4q)*

*= (3p)² - (4q)²*

*= 9p² - 16q²***²+10a**

=2a(2a+5)+3(2a+5)

=4a__1) (2a+3)(2a+5)__=2a(2a+5)+3(2a+5)

=4a

**²+16a+15**

*+6a+15*

=4a=4a

2) (3p-4q)(3p-4q)

=3p(3p-4q)-4q(3p-4q)

=9p²-12pq-12pq+16q²

=9p²-24pq+16q²