Enter your answer and show all the steps that you use to solve this problem in the space provided.

Question

Simplify(2√5+3√7)^2
Show your work. Justify each step.

Answer 1

since (a+b)^2 = a^2 + 2ab + b^2, we have
(2√5+3√7)^2
= (2√5)^2 + 2(2√5)(3√7) + (3√7)^2
= 4*5 + 12√5√7 + 9*7
= ...