Evaluate
x\left(10x+3\right)
Expand
10x^{2}+3x
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\left(x^{2}+\frac{3}{10}x\right)\times 10
Use the distributive property to multiply x+\frac{3}{10} by x.
10x^{2}+\frac{3}{10}x\times 10
Use the distributive property to multiply x^{2}+\frac{3}{10}x by 10.
10x^{2}+3x
Cancel out 10 and 10.
\left(x^{2}+\frac{3}{10}x\right)\times 10
Use the distributive property to multiply x+\frac{3}{10} by x.
10x^{2}+\frac{3}{10}x\times 10
Use the distributive property to multiply x^{2}+\frac{3}{10}x by 10.
10x^{2}+3x
Cancel out 10 and 10.
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