Question

Find,

a. (3x+4y) ²

b. (4p+5q) ²

c. (5x-3y) ²

d. (4p-2q) ²

Using the identity
(a+b) ² and ( a-b) ²

please answer correctly
answer four of them ​

Answer 1

(a+b)²=a²+2ab+b²

a.(3x+4y)²=(3x)²+2×(3x×4y)+(4y)²

=9x²+24xy+16y²

b. do it yourself

c.(a-b)²=a²-2ab+b²

(5x-3y)²=(5x)²-2×(5x×3y)+(3y)²

=25x²-30xy+9y²

d.do it yourself