Question

1.
Find the square of each of the following:


a. x + 2y
​

Answer 1

Answer:

Step-by-step explanation:

We have to apply the following identity: $(x + y)^{2} = x^{2} + y^{2} + 2xy$

$(x + 2y)^{2} = x^{2} + (2y)^{2} + 2(x)(2y)$

              $= x^{2} + 4y^{2} + 4xy$