Question

Find the value for each variable 2x (y+x) (y-x)

Answer 1

He value of
x
is
−
4
and
y
is
−
8

Explanation:
given equations are
y
=
x
−
4
and
y
=
2
x

put
y
=
2
x
in
y
=
x
−
4
then we have
2
x
=
x
−
4
⇒
2
x
−
x
=
−
4
⇒
x
=
−
4
since
y
=
2
x
⇒
y
=
−
8