Answer:
[tex]x^2 + 10x[/tex]
Step-by-step explanation:
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We would distribute the outside 'x' into what's ever inside the parentheses.
[tex]x(10+x)\\\rule{150}{0.5}\\\rightarrow x * 10 = 10x\\\rightarrow x * x = x^2\\\\x(10+x) = 10x + x^2\\\\\boxed{x^2 + 10x} \leftarrow \text{Switch Sides}[/tex]
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Hope this helps.
