(2x+1)(x-3)-4=0

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Solution for (2x+1)(x-3)-4=0 equation:


Simplifying
(2x + 1)(x + -3) + -4 = 0

Reorder the terms:
(1 + 2x)(x + -3) + -4 = 0

Reorder the terms:
(1 + 2x)(-3 + x) + -4 = 0

Multiply (1 + 2x) * (-3 + x)
(1(-3 + x) + 2x * (-3 + x)) + -4 = 0
((-3 * 1 + x * 1) + 2x * (-3 + x)) + -4 = 0
((-3 + 1x) + 2x * (-3 + x)) + -4 = 0
(-3 + 1x + (-3 * 2x + x * 2x)) + -4 = 0
(-3 + 1x + (-6x + 2x2)) + -4 = 0

Combine like terms: 1x + -6x = -5x
(-3 + -5x + 2x2) + -4 = 0

Reorder the terms:
-3 + -4 + -5x + 2x2 = 0

Combine like terms: -3 + -4 = -7
-7 + -5x + 2x2 = 0

Solving
-7 + -5x + 2x2 = 0

Solving for variable 'x'.

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

Subproblem 1

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

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 = {-1, 3.5}

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