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

2 Answers
Mar 7, 2018

21 x^2

Explanation:

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

Another example,

2x * (5x + 4x) = 10x^2 + 8x^2 = 18x^2

Mar 7, 2018

21x^2

Explanation:

I am understanding the expression 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 by x, and it should be x^2.

Put 21 and x^2 together to get 21x^2.