y=(x+4)(2x-7)

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Solution for y=(x+4)(2x-7) equation: 


Simplifying
y = (x + 4)(2x + -7)

Reorder the terms:
y = (4 + x)(2x + -7)

Reorder the terms:
y = (4 + x)(-7 + 2x)

Multiply (4 + x) * (-7 + 2x)
y = (4(-7 + 2x) + x(-7 + 2x))
y = ((-7 * 4 + 2x * 4) + x(-7 + 2x))
y = ((-28 + 8x) + x(-7 + 2x))
y = (-28 + 8x + (-7 * x + 2x * x))
y = (-28 + 8x + (-7x + 2x2))

Combine like terms: 8x + -7x = 1x
y = (-28 + 1x + 2x2)

Solving
y = -28 + 1x + 2x2

Solving for variable 'y'.

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

Simplifying
y = -28 + 1x + 2x2

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