4x(4-x)=5(2+x)

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Solution for 4x(4-x)=5(2+x) equation:


Simplifying
4x(4 + -1x) = 5(2 + x)
(4 * 4x + -1x * 4x) = 5(2 + x)
(16x + -4x2) = 5(2 + x)
16x + -4x2 = (2 * 5 + x * 5)
16x + -4x2 = (10 + 5x)

Solving
16x + -4x2 = 10 + 5x

Solving for variable 'x'.

Reorder the terms:
-10 + 16x + -5x + -4x2 = 10 + 5x + -10 + -5x

Combine like terms: 16x + -5x = 11x
-10 + 11x + -4x2 = 10 + 5x + -10 + -5x

Reorder the terms:
-10 + 11x + -4x2 = 10 + -10 + 5x + -5x

Combine like terms: 10 + -10 = 0
-10 + 11x + -4x2 = 0 + 5x + -5x
-10 + 11x + -4x2 = 5x + -5x

Combine like terms: 5x + -5x = 0
-10 + 11x + -4x2 = 0

Begin completing the square.  Divide all terms by
-4 the coefficient of the squared term: 

Divide each side by '-4'.
2.5 + -2.75x + x2 = 0

Move the constant term to the right:

Add '-2.5' to each side of the equation.
2.5 + -2.75x + -2.5 + x2 = 0 + -2.5

Reorder the terms:
2.5 + -2.5 + -2.75x + x2 = 0 + -2.5

Combine like terms: 2.5 + -2.5 = 0.0
0.0 + -2.75x + x2 = 0 + -2.5
-2.75x + x2 = 0 + -2.5

Combine like terms: 0 + -2.5 = -2.5
-2.75x + x2 = -2.5

The x term is -2.75x.  Take half its coefficient (-1.375).
Square it (1.890625) and add it to both sides.

Add '1.890625' to each side of the equation.
-2.75x + 1.890625 + x2 = -2.5 + 1.890625

Reorder the terms:
1.890625 + -2.75x + x2 = -2.5 + 1.890625

Combine like terms: -2.5 + 1.890625 = -0.609375
1.890625 + -2.75x + x2 = -0.609375

Factor a perfect square on the left side:
(x + -1.375)(x + -1.375) = -0.609375

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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