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Simplifying
x * -5x + 4 = 0
Reorder the terms for easier multiplication:
-5x * x + 4 = 0
Multiply x * x
-5x2 + 4 = 0
Reorder the terms:
4 + -5x2 = 0
Solving
4 + -5x2 = 0
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '-4' to each side of the equation.
4 + -4 + -5x2 = 0 + -4
Combine like terms: 4 + -4 = 0
0 + -5x2 = 0 + -4
-5x2 = 0 + -4
Combine like terms: 0 + -4 = -4
-5x2 = -4
Divide each side by '-5'.
x2 = 0.8
Simplifying
x2 = 0.8
Take the square root of each side:
x = {-0.894427191, 0.894427191}
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