Ayan po sagotan niyo​

"Answer:

1.2x²-81=0

2x²=81

x²=81/2

doing square root on both side

x=

x=

2.

2x²-72=0

2x²=72

x²=72/2

x²=36

x=

x=6

3.

5x²=80

x²=80/5

x²=16

x=

x=4

4.

4x²+1=325

4x²=325-1

4x²=324

x²=324/4

x=

x=9

5.

x²-9=0

x²=9

x=

x=3"