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Simplifying
(3x + 0.8)(3x + -0.8) = 0
Reorder the terms:
(0.8 + 3x)(3x + -0.8) = 0
Reorder the terms:
(0.8 + 3x)(-0.8 + 3x) = 0
Multiply (0.8 + 3x) * (-0.8 + 3x)
(0.8(-0.8 + 3x) + 3x * (-0.8 + 3x)) = 0
((-0.8 * 0.8 + 3x * 0.8) + 3x * (-0.8 + 3x)) = 0
((-0.64 + 2.4x) + 3x * (-0.8 + 3x)) = 0
(-0.64 + 2.4x + (-0.8 * 3x + 3x * 3x)) = 0
(-0.64 + 2.4x + (-2.4x + 9x2)) = 0
Combine like terms: 2.4x + -2.4x = 0.0
(-0.64 + 0.0 + 9x2) = 0
(-0.64 + 9x2) = 0
Solving
-0.64 + 9x2 = 0
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '0.64' to each side of the equation.
-0.64 + 0.64 + 9x2 = 0 + 0.64
Combine like terms: -0.64 + 0.64 = 0.00
0.00 + 9x2 = 0 + 0.64
9x2 = 0 + 0.64
Combine like terms: 0 + 0.64 = 0.64
9x2 = 0.64
Divide each side by '9'.
x2 = 0.07111111111
Simplifying
x2 = 0.07111111111
Take the square root of each side:
x = {-0.266666667, 0.266666667}
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