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-16y^{2}+56y-49
Evaluate
-\left(4y-7\right)^{2}
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-\left(16y^{2}-56y+49\right)
Use binomial theorem \left(a-b\right)^{2}=a^{2}-2ab+b^{2} to expand \left(4y-7\right)^{2}.
-16y^{2}+56y-49
To find the opposite of 16y^{2}-56y+49, find the opposite of each term.
-\left(16y^{2}-56y+49\right)
Use binomial theorem \left(a-b\right)^{2}=a^{2}-2ab+b^{2} to expand \left(4y-7\right)^{2}.
-16y^{2}+56y-49
To find the opposite of 16y^{2}-56y+49, find the opposite of each term.
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