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 56 as well and sum (Inside, Outside) to equal 15. For this problem, those two numbers are 7 and 8. Then, plug these into a set of binomials using the square root of the First variable (y²):

y² + 15y + 56
y² + (7 + 8)y + (7 x 8)
(y + 7)(y + 8)

A cylinder is a solid figure with straight parallel sides and a circular or oval cross section with a radius (r) and a height (h). The volume of a cylinder is π r²h and the surface area is 2(π r²) + 2π rh.

Perimeter is equal to the sum of the four sides:

p = a + b + c + d
p = 3 + 3 + 2 + 2
p = 10

The area of a rectangle is equal to its length x width:

a = l x w
a = a x b
a = 5 x 6
a = 30

An isosceles triangle has two sides of equal length. An equilateral triangle has three sides of equal length. In a right triangle, two sides meet at a right angle.