(x+3)(x+5)=x^2+7x-3

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


Simplifying
(x + 3)(x + 5) = x2 + 7x + -3

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

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

Multiply (3 + x) * (5 + x)
(3(5 + x) + x(5 + x)) = x2 + 7x + -3
((5 * 3 + x * 3) + x(5 + x)) = x2 + 7x + -3
((15 + 3x) + x(5 + x)) = x2 + 7x + -3
(15 + 3x + (5 * x + x * x)) = x2 + 7x + -3
(15 + 3x + (5x + x2)) = x2 + 7x + -3

Combine like terms: 3x + 5x = 8x
(15 + 8x + x2) = x2 + 7x + -3

Reorder the terms:
15 + 8x + x2 = -3 + 7x + x2

Add '-1x2' to each side of the equation.
15 + 8x + x2 + -1x2 = -3 + 7x + x2 + -1x2

Combine like terms: x2 + -1x2 = 0
15 + 8x + 0 = -3 + 7x + x2 + -1x2
15 + 8x = -3 + 7x + x2 + -1x2

Combine like terms: x2 + -1x2 = 0
15 + 8x = -3 + 7x + 0
15 + 8x = -3 + 7x

Solving
15 + 8x = -3 + 7x

Solving for variable 'x'.

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

Add '-7x' to each side of the equation.
15 + 8x + -7x = -3 + 7x + -7x

Combine like terms: 8x + -7x = 1x
15 + 1x = -3 + 7x + -7x

Combine like terms: 7x + -7x = 0
15 + 1x = -3 + 0
15 + 1x = -3

Add '-15' to each side of the equation.
15 + -15 + 1x = -3 + -15

Combine like terms: 15 + -15 = 0
0 + 1x = -3 + -15
1x = -3 + -15

Combine like terms: -3 + -15 = -18
1x = -18

Divide each side by '1'.
x = -18

Simplifying
x = -18

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