7r^2-45=-17

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Solution for 7r^2-45=-17 equation: 


Simplifying
7r2 + -45 = -17

Reorder the terms:
-45 + 7r2 = -17

Solving
-45 + 7r2 = -17

Solving for variable 'r'.

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

Add '45' to each side of the equation.
-45 + 45 + 7r2 = -17 + 45

Combine like terms: -45 + 45 = 0
0 + 7r2 = -17 + 45
7r2 = -17 + 45

Combine like terms: -17 + 45 = 28
7r2 = 28

Divide each side by '7'.
r2 = 4

Simplifying
r2 = 4

Take the square root of each side:
r = {-2, 2}

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