Question

which values of x and y will make the expression 5(x-y)2 equal to 20?

Answer 1

hint: let z = x-y

replace "x-y" with z, then solve for z

Answer 2

\[5(x-y)^{2} equal \to 20\]

Answer 3

so is x-y/z

Answer 4

5(x-y)^2 = 20

5z^2 = 20

z^2 = 20/5

z^2 = 4

z = ???

Answer 5

z=8

Answer 6

no

Answer 7

z^2 means z squared

Answer 8

i don't know

Answer 9

if z^2 = 4, then z = 2 or z = -2

so if z = x-y, then

x-y = 2

or

x-y = -2

Answer 10

from there, you can solve each equation for y to get it in terms of x