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\left(10x+50\right)^{2}
Use the distributive property to multiply 10 by x+5.
100x^{2}+1000x+2500
Use binomial theorem \left(a+b\right)^{2}=a^{2}+2ab+b^{2} to expand \left(10x+50\right)^{2}.
\left(10x+50\right)^{2}
Use the distributive property to multiply 10 by x+5.
100x^{2}+1000x+2500
Use binomial theorem \left(a+b\right)^{2}=a^{2}+2ab+b^{2} to expand \left(10x+50\right)^{2}.