13r^2+21-10=0

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Solution for 13r^2+21-10=0 equation:


Simplifying
13r2 + 21 + -10 = 0

Reorder the terms:
21 + -10 + 13r2 = 0

Combine like terms: 21 + -10 = 11
11 + 13r2 = 0

Solving
11 + 13r2 = 0

Solving for variable 'r'.

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

Add '-11' to each side of the equation.
11 + -11 + 13r2 = 0 + -11

Combine like terms: 11 + -11 = 0
0 + 13r2 = 0 + -11
13r2 = 0 + -11

Combine like terms: 0 + -11 = -11
13r2 = -11

Divide each side by '13'.
r2 = -0.8461538462

Simplifying
r2 = -0.8461538462

Reorder the terms:
0.8461538462 + r2 = -0.8461538462 + 0.8461538462

Combine like terms: -0.8461538462 + 0.8461538462 = 0.0000000000
0.8461538462 + r2 = 0.0000000000

The solution to this equation could not be determined.

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