Expand
4x^{2}-12xy-28x+9y^{2}+42y+49
Evaluate
\left(2x-3y-7\right)^{2}
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4x^{2}-12xy-28x+9y^{2}+42y+49
Square 2x-3y-7.
4x^{2}-12xy-28x+9y^{2}+42y+49
Square 2x-3y-7.
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