y=3(x+7)(x+3)

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Solution for y=3(x+7)(x+3) equation: 


Simplifying
y = 3(x + 7)(x + 3)

Reorder the terms:
y = 3(7 + x)(x + 3)

Reorder the terms:
y = 3(7 + x)(3 + x)

Multiply (7 + x) * (3 + x)
y = 3(7(3 + x) + x(3 + x))
y = 3((3 * 7 + x * 7) + x(3 + x))
y = 3((21 + 7x) + x(3 + x))
y = 3(21 + 7x + (3 * x + x * x))
y = 3(21 + 7x + (3x + x2))

Combine like terms: 7x + 3x = 10x
y = 3(21 + 10x + x2)
y = (21 * 3 + 10x * 3 + x2 * 3)
y = (63 + 30x + 3x2)

Solving
y = 63 + 30x + 3x2

Solving for variable 'y'.

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

Simplifying
y = 63 + 30x + 3x2

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