(2x-7)(5x+2)=0

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Solution for (2x-7)(5x+2)=0 equation: 


Simplifying
(2x + -7)(5x + 2) = 0

Reorder the terms:
(-7 + 2x)(5x + 2) = 0

Reorder the terms:
(-7 + 2x)(2 + 5x) = 0

Multiply (-7 + 2x) * (2 + 5x)
(-7(2 + 5x) + 2x * (2 + 5x)) = 0
((2 * -7 + 5x * -7) + 2x * (2 + 5x)) = 0
((-14 + -35x) + 2x * (2 + 5x)) = 0
(-14 + -35x + (2 * 2x + 5x * 2x)) = 0
(-14 + -35x + (4x + 10x2)) = 0

Combine like terms: -35x + 4x = -31x
(-14 + -31x + 10x2) = 0

Solving
-14 + -31x + 10x2 = 0

Solving for variable 'x'.

Factor a trinomial.
(-2 + -5x)(7 + -2x) = 0


Subproblem 1
Set the factor '(-2 + -5x)' equal to zero and attempt to solve:

Simplifying
-2 + -5x = 0

Solving
-2 + -5x = 0

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

Add '2' to each side of the equation.
-2 + 2 + -5x = 0 + 2

Combine like terms: -2 + 2 = 0
0 + -5x = 0 + 2
-5x = 0 + 2

Combine like terms: 0 + 2 = 2
-5x = 2

Divide each side by '-5'.
x = -0.4

Simplifying
x = -0.4

Subproblem 2
Set the factor '(7 + -2x)' equal to zero and attempt to solve:

Simplifying
7 + -2x = 0

Solving
7 + -2x = 0

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

Add '-7' to each side of the equation.
7 + -7 + -2x = 0 + -7

Combine like terms: 7 + -7 = 0
0 + -2x = 0 + -7
-2x = 0 + -7

Combine like terms: 0 + -7 = -7
-2x = -7

Divide each side by '-2'.
x = 3.5

Simplifying
x = 3.5
Solution
x = {-0.4, 3.5}

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