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Simplifying
25x2 + -30 + 9 = 81
Reorder the terms:
-30 + 9 + 25x2 = 81
Combine like terms: -30 + 9 = -21
-21 + 25x2 = 81
Solving
-21 + 25x2 = 81
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '21' to each side of the equation.
-21 + 21 + 25x2 = 81 + 21
Combine like terms: -21 + 21 = 0
0 + 25x2 = 81 + 21
25x2 = 81 + 21
Combine like terms: 81 + 21 = 102
25x2 = 102
Divide each side by '25'.
x2 = 4.08
Simplifying
x2 = 4.08
Take the square root of each side:
x = {-2.019900988, 2.019900988}
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