The first step to solve a quadratic equation that's set to zero is to factor the quadratic equation:

y² - 12y + 32 = 0
(y - 4)(y - 8) = 0

For this expression to be true, the left side of the expression must equal zero. Therefore, either (y - 4) or (y - 8) must equal zero:

If (y - 4) = 0, y must equal 4
If (y - 8) = 0, y must equal 8

So the solution is that y = 4 or 8

To factor a quadratic expression, apply the FOIL method (First, Outside, Inside, Last) in reverse. First, find the two Last terms that will multiply to produce 49 as well and sum (Inside, Outside) to equal 14. For this problem, those two numbers are 7 and 7. Then, plug these into a set of binomials using the square root of the First variable (y²):

y² + 14y + 49
y² + (7 + 7)y + (7 x 7)
(y + 7)(y + 7)

An equation is two expressions separated by an equal sign. The key to solving equations is to repeatedly do the same thing to both sides of the equation until the variable is isolated on one side of the equal sign and the answer on the other.

A cube is a rectangular solid box with a height (h), length (l), and width (w). The volume is h x l x w and the surface area is 2lw x 2wh + 2lh.

The formula for circumference is circle diameter x π:

c = πd
c = 18π