Evaluate
\left(45+2a-3y\right)^{2}
Expand
9y^{2}-12ay-270y+4a^{2}+180a+2025
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\left(2a-3y+45\right)^{2}
Subtract 7 from 52 to get 45.
9y^{2}-12ay-270y+4a^{2}+180a+2025
Square 2a-3y+45.
\left(2a-3y+45\right)^{2}
Subtract 7 from 52 to get 45.
9y^{2}-12ay-270y+4a^{2}+180a+2025
Square 2a-3y+45.
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