4(x-4)(4x+1)=0

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Solution for 4(x-4)(4x+1)=0 equation: 


Simplifying
4(x + -4)(4x + 1) = 0

Reorder the terms:
4(-4 + x)(4x + 1) = 0

Reorder the terms:
4(-4 + x)(1 + 4x) = 0

Multiply (-4 + x) * (1 + 4x)
4(-4(1 + 4x) + x(1 + 4x)) = 0
4((1 * -4 + 4x * -4) + x(1 + 4x)) = 0
4((-4 + -16x) + x(1 + 4x)) = 0
4(-4 + -16x + (1 * x + 4x * x)) = 0
4(-4 + -16x + (1x + 4x2)) = 0

Combine like terms: -16x + 1x = -15x
4(-4 + -15x + 4x2) = 0
(-4 * 4 + -15x * 4 + 4x2 * 4) = 0
(-16 + -60x + 16x2) = 0

Solving
-16 + -60x + 16x2 = 0

Solving for variable 'x'.

Factor out the Greatest Common Factor (GCF), '4'.
4(-4 + -15x + 4x2) = 0

Factor a trinomial.
4((-1 + -4x)(4 + -1x)) = 0

Ignore the factor 4.

Subproblem 1
Set the factor '(-1 + -4x)' equal to zero and attempt to solve:

Simplifying
-1 + -4x = 0

Solving
-1 + -4x = 0

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

Add '1' to each side of the equation.
-1 + 1 + -4x = 0 + 1

Combine like terms: -1 + 1 = 0
0 + -4x = 0 + 1
-4x = 0 + 1

Combine like terms: 0 + 1 = 1
-4x = 1

Divide each side by '-4'.
x = -0.25

Simplifying
x = -0.25

Subproblem 2
Set the factor '(4 + -1x)' equal to zero and attempt to solve:

Simplifying
4 + -1x = 0

Solving
4 + -1x = 0

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

Add '-4' to each side of the equation.
4 + -4 + -1x = 0 + -4

Combine like terms: 4 + -4 = 0
0 + -1x = 0 + -4
-1x = 0 + -4

Combine like terms: 0 + -4 = -4
-1x = -4

Divide each side by '-1'.
x = 4

Simplifying
x = 4
Solution
x = {-0.25, 4}

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