4x^2-40X+90=0

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Solution for 4x^2-40X+90=0 equation: 


Simplifying
4x2 + -40X + 90 = 0

Reorder the terms:
90 + -40X + 4x2 = 0

Solving
90 + -40X + 4x2 = 0

Solving for variable 'X'.

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

Add '-90' to each side of the equation.
90 + -40X + -90 + 4x2 = 0 + -90

Reorder the terms:
90 + -90 + -40X + 4x2 = 0 + -90

Combine like terms: 90 + -90 = 0
0 + -40X + 4x2 = 0 + -90
-40X + 4x2 = 0 + -90

Combine like terms: 0 + -90 = -90
-40X + 4x2 = -90

Add '-4x2' to each side of the equation.
-40X + 4x2 + -4x2 = -90 + -4x2

Combine like terms: 4x2 + -4x2 = 0
-40X + 0 = -90 + -4x2
-40X = -90 + -4x2

Divide each side by '-40'.
X = 2.25 + 0.1x2

Simplifying
X = 2.25 + 0.1x2

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