10r^2+20=200

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Solution for 10r^2+20=200 equation: 


Simplifying
10r2 + 20 = 200

Reorder the terms:
20 + 10r2 = 200

Solving
20 + 10r2 = 200

Solving for variable 'r'.

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

Add '-20' to each side of the equation.
20 + -20 + 10r2 = 200 + -20

Combine like terms: 20 + -20 = 0
0 + 10r2 = 200 + -20
10r2 = 200 + -20

Combine like terms: 200 + -20 = 180
10r2 = 180

Divide each side by '10'.
r2 = 18

Simplifying
r2 = 18

Take the square root of each side:
r = {-4.242640687, 4.242640687}

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