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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