21x*(-7x)=

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Solution for 21x*(-7x)= equation:


Simplifying
21x(-7x) = 0

Remove parenthesis around (-7x)
21x * -7x = 0

Reorder the terms for easier multiplication:
21 * -7x * x = 0

Multiply 21 * -7
-147x * x = 0

Multiply x * x
-147x2 = 0

Solving
-147x2 = 0

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Divide each side by '-147'.
x2 = 0

Simplifying
x2 = 0

Take the square root of each side:
x = {0}

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