>
8
th
grade
1/5
Please, look at your solution again. Is everything filled correctly?
Quadratic equations
Instructions:
Solve quadratic equation and find out values of unknown variables x
1
and x
2
.
4.x
2
+ 4.x - 80
=
0
/
=
0
(x
).(x
)
=
0
x
1
=
x
2
=