Atriangle has two sides with equal length and a third side 16 meters long. if the perimeter is 42 meters, what is the length of each of the equal sides? a. 8 m b. 13 m c. 14 m d. 26 m

hello from mrbilldoesmath!

answer:   x (x+6)^2, choice b

discussion:

factor x out of the equation:

x^3 + 12x^2 + 36x = x (x^2 + 12x + 36).

note that 6+6 = 12 and 6*6 = 36 so the above factors into:

x (x+6)^2

which is choice b

you,

mrb