(5x-4)(5x+4)=0

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Solution for (5x-4)(5x+4)=0 equation:


Simplifying
(5x + -4)(5x + 4) = 0

Reorder the terms:
(-4 + 5x)(5x + 4) = 0

Reorder the terms:
(-4 + 5x)(4 + 5x) = 0

Multiply (-4 + 5x) * (4 + 5x)
(-4(4 + 5x) + 5x * (4 + 5x)) = 0
((4 * -4 + 5x * -4) + 5x * (4 + 5x)) = 0
((-16 + -20x) + 5x * (4 + 5x)) = 0
(-16 + -20x + (4 * 5x + 5x * 5x)) = 0
(-16 + -20x + (20x + 25x2)) = 0

Combine like terms: -20x + 20x = 0
(-16 + 0 + 25x2) = 0
(-16 + 25x2) = 0

Solving
-16 + 25x2 = 0

Solving for variable 'x'.

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

Add '16' to each side of the equation.
-16 + 16 + 25x2 = 0 + 16

Combine like terms: -16 + 16 = 0
0 + 25x2 = 0 + 16
25x2 = 0 + 16

Combine like terms: 0 + 16 = 16
25x2 = 16

Divide each side by '25'.
x2 = 0.64

Simplifying
x2 = 0.64

Take the square root of each side:
x = {-0.8, 0.8}

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