Question

given xy=4 and x to the power of 2 +y to the power of 2 = a, which expression is equal to (x+y) to the power of 2?

Answer 1

Expanding (x+y) to the power of 2, we get:

(x+y) to the power of 2 = x to the power of 2 + 2xy + y to the power of 2

Substituting the

Step-by-step explanation:

(but this is not English)