(-7R)(-4R)=

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Solution for (-7R)(-4R)= equation: 


Simplifying
(-7R)(-4R) = 0

Remove parenthesis around (-7R)
-7R(-4R) = 0

Remove parenthesis around (-4R)
-7R * -4R = 0

Reorder the terms for easier multiplication:
-7 * -4R * R = 0

Multiply -7 * -4
28R * R = 0

Multiply R * R
28R2 = 0

Solving
28R2 = 0

Solving for variable 'R'.

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

Divide each side by '28'.
R2 = 0

Simplifying
R2 = 0

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

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