Which product is equivalent to 25x2 – 16?

(5x-4)(5x+4)

Step-by-step explanation:

5x*5x= 25x^2

5x*4= 20x but -4*5x cancels it out (20x-20x=0)

-4*4=16

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

step-by-step explanation: the answer for wha if rt is 10 centimeters long, and wha is st? it’s 6