y=(x+3)(x+12)

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Solution for y=(x+3)(x+12) equation: 


Simplifying
y = (x + 3)(x + 12)

Reorder the terms:
y = (3 + x)(x + 12)

Reorder the terms:
y = (3 + x)(12 + x)

Multiply (3 + x) * (12 + x)
y = (3(12 + x) + x(12 + x))
y = ((12 * 3 + x * 3) + x(12 + x))
y = ((36 + 3x) + x(12 + x))
y = (36 + 3x + (12 * x + x * x))
y = (36 + 3x + (12x + x2))

Combine like terms: 3x + 12x = 15x
y = (36 + 15x + x2)

Solving
y = 36 + 15x + x2

Solving for variable 'y'.

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

Simplifying
y = 36 + 15x + x2

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