x^2+bx-35=(x+5)(x-7)

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Solution for x^2+bx-35=(x+5)(x-7) equation:


Simplifying
x2 + bx + -35 = (x + 5)(x + -7)

Reorder the terms:
-35 + bx + x2 = (x + 5)(x + -7)

Reorder the terms:
-35 + bx + x2 = (5 + x)(x + -7)

Reorder the terms:
-35 + bx + x2 = (5 + x)(-7 + x)

Multiply (5 + x) * (-7 + x)
-35 + bx + x2 = (5(-7 + x) + x(-7 + x))
-35 + bx + x2 = ((-7 * 5 + x * 5) + x(-7 + x))
-35 + bx + x2 = ((-35 + 5x) + x(-7 + x))
-35 + bx + x2 = (-35 + 5x + (-7 * x + x * x))
-35 + bx + x2 = (-35 + 5x + (-7x + x2))

Combine like terms: 5x + -7x = -2x
-35 + bx + x2 = (-35 + -2x + x2)

Add '35' to each side of the equation.
-35 + bx + 35 + x2 = -35 + -2x + 35 + x2

Reorder the terms:
-35 + 35 + bx + x2 = -35 + -2x + 35 + x2

Combine like terms: -35 + 35 = 0
0 + bx + x2 = -35 + -2x + 35 + x2
bx + x2 = -35 + -2x + 35 + x2

Reorder the terms:
bx + x2 = -35 + 35 + -2x + x2

Combine like terms: -35 + 35 = 0
bx + x2 = 0 + -2x + x2
bx + x2 = -2x + x2

Add '-1x2' to each side of the equation.
bx + x2 + -1x2 = -2x + x2 + -1x2

Combine like terms: x2 + -1x2 = 0
bx + 0 = -2x + x2 + -1x2
bx = -2x + x2 + -1x2

Combine like terms: x2 + -1x2 = 0
bx = -2x + 0
bx = -2x

Solving
bx = -2x

Solving for variable 'b'.

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

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

Simplifying
b = -2

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