y=(x*x)-4x-21

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Solution for y=(x*x)-4x-21 equation: 


Simplifying
y = (x * x) + -4x + -21

Multiply x * x
y = (x2) + -4x + -21
y = x2 + -4x + -21

Reorder the terms:
y = -21 + -4x + x2

Solving
y = -21 + -4x + x2

Solving for variable 'y'.

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

Simplifying
y = -21 + -4x + x2

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