Answer:
x=3
Step-by-step explanation:
5x²-45=0 | +45
5x² = 45 | :5
x² = 9 | /9
x = 3
x=3,x=-3
Use the quadratic formula
where
a=5
b=0
c=-45
which means x=(0±30)/10
so you do (0+30)/10=3
and (0-30)/10=-3
to find your two solutions
