Evaluate -3x 3 y 2, if x = -2 and y = -1. -24 24 36 -36

24

Step-by-step explanation:

-3x^3*y^2=-3(-2)^3=(-3)(-8)*(-1)^2=24*1=24

we have three similar triangles, because each has a right angle and shares an angle.   let's write the angles in order: opposite to short leg, long leg, hypotenuse.

cab similar to bad similar to cbd

or as ratios,

ca: ab: cb = ba: ad: bd = cb: bd: cd

we also know

ac = ad + cd

(ad+cd): ab: cb = ba: ad: bd = cb: bd: cd

(ad+cd)/cb=cb/cd

we have cb=6, ad=5 and seek x=cd.

we reject the negative root and conclude x=4

answer: 4