Respuesta :

apologiabiology
group and factor
group y's with y's and z's with z's
(y²-10y)+(10z-yz)
factor
y(y-10)+z(10-y)
force undistribute -1
-y(10-y)+z(10-y)
factor
(10-y)(-y+z)
(z-y)(10-y) or
(y-z)(y-10)
nap14hockey
First rearrange the equation.

y2- yz - 10y+ 10z

At this point it's factoring by grouping.
Y(y-z) -10(y-z)
(Y-10)(y-z)

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