An equilateral triangle has 12in base its perimeter measures

Equilateral triangle means that all lengths of a triangle are the same, so if we are given one side of the triangle, 12in(the base), the rest of the sides are also 12in as well.

Since there are 3 sides to a triangle and one side measures 12 inches:

3 x 12 = 36 inches

perimeter =distance round a figure

sic

since an equilateral has all of its side equal

perimeter is 12×3

the answer is 36

x= -3 and

step-by-step explanation:

to find the roots of a cubic, use division or factoring to find the factors then set equal to 0. as this is a difference of cubes, it factors into

where a is the cube root of .

here   this is 27 and the cube root of 27 is 3. so we write using the form:

.

set each factor to 0 and solve for x.

x-3=0

x=3

the quadratic expression does not factor and must be solved using the quadratic formula.

where a = 1, b=3, and c=9

this cubic has two complex roots.