(2x+3)*(4x+7)=8x^2-5

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Solution for (2x+3)*(4x+7)=8x^2-5 equation:


Simplifying
(2x + 3)(4x + 7) = 8x2 + -5

Reorder the terms:
(3 + 2x)(4x + 7) = 8x2 + -5

Reorder the terms:
(3 + 2x)(7 + 4x) = 8x2 + -5

Multiply (3 + 2x) * (7 + 4x)
(3(7 + 4x) + 2x * (7 + 4x)) = 8x2 + -5
((7 * 3 + 4x * 3) + 2x * (7 + 4x)) = 8x2 + -5
((21 + 12x) + 2x * (7 + 4x)) = 8x2 + -5
(21 + 12x + (7 * 2x + 4x * 2x)) = 8x2 + -5
(21 + 12x + (14x + 8x2)) = 8x2 + -5

Combine like terms: 12x + 14x = 26x
(21 + 26x + 8x2) = 8x2 + -5

Reorder the terms:
21 + 26x + 8x2 = -5 + 8x2

Add '-8x2' to each side of the equation.
21 + 26x + 8x2 + -8x2 = -5 + 8x2 + -8x2

Combine like terms: 8x2 + -8x2 = 0
21 + 26x + 0 = -5 + 8x2 + -8x2
21 + 26x = -5 + 8x2 + -8x2

Combine like terms: 8x2 + -8x2 = 0
21 + 26x = -5 + 0
21 + 26x = -5

Solving
21 + 26x = -5

Solving for variable 'x'.

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

Add '-21' to each side of the equation.
21 + -21 + 26x = -5 + -21

Combine like terms: 21 + -21 = 0
0 + 26x = -5 + -21
26x = -5 + -21

Combine like terms: -5 + -21 = -26
26x = -26

Divide each side by '26'.
x = -1

Simplifying
x = -1

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