How do u do the problem 3x·(7·x) simplified?

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Answer 1 · 2018-03-07T00:45:05

$21 x^{2}$ $21 x^2$

You simply multiply $3 x$ $3x$ to all what is inside the parentheses. Luckily, you have here just $7 x$ $7x$ .

Another example,

$2 x \cdot (5 x + 4 x) = 10 x^{2} + 8 x^{2} = 18 x^{2}$ $2x * (5x + 4x) = 10x^2 + 8x^2 = 18x^2$

Answer 2 · 2018-03-07T00:45:44

$21 x^{2}$ $21x^2$

I am understanding the expression $3 x \times 7 x$ $3x \times 7x$ . The steps below are for simplifying that expression.

Multiply the coefficients together - meaning 3 and 7 - and you should get 21.

Multiply $x$ $x$ by $x$ $x$ , and it should be $x^{2}$ $x^2$ .

Put 21 and $x^{2}$ $x^2$ together to get $21 x^{2}$ $21x^2$ .