(5x-7)-(3x+4)(7-5x)=25x^2-49

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Solution for (5x-7)-(3x+4)(7-5x)=25x^2-49 equation:


Simplifying
(5x + -7) + -1(3x + 4)(7 + -5x) = 25x2 + -49

Reorder the terms:
(-7 + 5x) + -1(3x + 4)(7 + -5x) = 25x2 + -49

Remove parenthesis around (-7 + 5x)
-7 + 5x + -1(3x + 4)(7 + -5x) = 25x2 + -49

Reorder the terms:
-7 + 5x + -1(4 + 3x)(7 + -5x) = 25x2 + -49

Multiply (4 + 3x) * (7 + -5x)
-7 + 5x + -1(4(7 + -5x) + 3x * (7 + -5x)) = 25x2 + -49
-7 + 5x + -1((7 * 4 + -5x * 4) + 3x * (7 + -5x)) = 25x2 + -49
-7 + 5x + -1((28 + -20x) + 3x * (7 + -5x)) = 25x2 + -49
-7 + 5x + -1(28 + -20x + (7 * 3x + -5x * 3x)) = 25x2 + -49
-7 + 5x + -1(28 + -20x + (21x + -15x2)) = 25x2 + -49

Combine like terms: -20x + 21x = 1x
-7 + 5x + -1(28 + 1x + -15x2) = 25x2 + -49
-7 + 5x + (28 * -1 + 1x * -1 + -15x2 * -1) = 25x2 + -49
-7 + 5x + (-28 + -1x + 15x2) = 25x2 + -49

Reorder the terms:
-7 + -28 + 5x + -1x + 15x2 = 25x2 + -49

Combine like terms: -7 + -28 = -35
-35 + 5x + -1x + 15x2 = 25x2 + -49

Combine like terms: 5x + -1x = 4x
-35 + 4x + 15x2 = 25x2 + -49

Reorder the terms:
-35 + 4x + 15x2 = -49 + 25x2

Solving
-35 + 4x + 15x2 = -49 + 25x2

Solving for variable 'x'.

Reorder the terms:
-35 + 49 + 4x + 15x2 + -25x2 = -49 + 25x2 + 49 + -25x2

Combine like terms: -35 + 49 = 14
14 + 4x + 15x2 + -25x2 = -49 + 25x2 + 49 + -25x2

Combine like terms: 15x2 + -25x2 = -10x2
14 + 4x + -10x2 = -49 + 25x2 + 49 + -25x2

Reorder the terms:
14 + 4x + -10x2 = -49 + 49 + 25x2 + -25x2

Combine like terms: -49 + 49 = 0
14 + 4x + -10x2 = 0 + 25x2 + -25x2
14 + 4x + -10x2 = 25x2 + -25x2

Combine like terms: 25x2 + -25x2 = 0
14 + 4x + -10x2 = 0

Factor out the Greatest Common Factor (GCF), '2'.
2(7 + 2x + -5x2) = 0

Factor a trinomial.
2((7 + -5x)(1 + x)) = 0

Ignore the factor 2.

Subproblem 1

Set the factor '(7 + -5x)' equal to zero and attempt to solve: Simplifying 7 + -5x = 0 Solving 7 + -5x = 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 + -5x = 0 + -7 Combine like terms: 7 + -7 = 0 0 + -5x = 0 + -7 -5x = 0 + -7 Combine like terms: 0 + -7 = -7 -5x = -7 Divide each side by '-5'. x = 1.4 Simplifying x = 1.4

Subproblem 2

Set the factor '(1 + x)' equal to zero and attempt to solve: Simplifying 1 + x = 0 Solving 1 + x = 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 + x = 0 + -1 Combine like terms: 1 + -1 = 0 0 + x = 0 + -1 x = 0 + -1 Combine like terms: 0 + -1 = -1 x = -1 Simplifying x = -1

Solution

x = {1.4, -1}

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