Expand
5y^{2}-70y+245
Evaluate
5\left(y-7\right)^{2}
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5\left(y^{2}-14y+49\right)
Use binomial theorem \left(a-b\right)^{2}=a^{2}-2ab+b^{2} to expand \left(y-7\right)^{2}.
5y^{2}-70y+245
Use the distributive property to multiply 5 by y^{2}-14y+49.
5\left(y^{2}-14y+49\right)
Use binomial theorem \left(a-b\right)^{2}=a^{2}-2ab+b^{2} to expand \left(y-7\right)^{2}.
5y^{2}-70y+245
Use the distributive property to multiply 5 by y^{2}-14y+49.
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