Question

(7y^2+3)^2

Answer 1

Remember:

\[(a+b)^2 = a^2 + b^2 + 2ab\]

Answer 2

\[(7y^2+3)^2=(7y^2+3)\times(7y^2+3)\]\[=7y^2\times(7y^2+3)+3\times(7y^2+3)\]\[=\cdots\]

Answer 3

\[=(7y^2\times7y^2+7y^2\times3+3\times7y^2+3\times3)\]\[=\cdots\]

Answer 4

Here,

\[a = 7y^2, b = 3\]

Put these values in above formula and solve to get the answer..