Evaluate
\left(7x-1\right)^{2}
Expand
49x^{2}-14x+1
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\left(7x-1\right)^{2}
Multiply 7x-1 and 7x-1 to get \left(7x-1\right)^{2}.
49x^{2}-14x+1
Use binomial theorem \left(a-b\right)^{2}=a^{2}-2ab+b^{2} to expand \left(7x-1\right)^{2}.
\left(7x-1\right)^{2}
Multiply 7x-1 and 7x-1 to get \left(7x-1\right)^{2}.
49x^{2}-14x+1
Use binomial theorem \left(a-b\right)^{2}=a^{2}-2ab+b^{2} to expand \left(7x-1\right)^{2}.
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