y=(x+1)(x+7)

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Solution for y=(x+1)(x+7) equation: 


Simplifying
y = (x + 1)(x + 7)

Reorder the terms:
y = (1 + x)(x + 7)

Reorder the terms:
y = (1 + x)(7 + x)

Multiply (1 + x) * (7 + x)
y = (1(7 + x) + x(7 + x))
y = ((7 * 1 + x * 1) + x(7 + x))
y = ((7 + 1x) + x(7 + x))
y = (7 + 1x + (7 * x + x * x))
y = (7 + 1x + (7x + x2))

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

Solving
y = 7 + 8x + x2

Solving for variable 'y'.

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

Simplifying
y = 7 + 8x + x2

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