Question

5x2 - 45=0
Quadratic formula

Answer 1

x=3

Explanation:

5x²-45=0 | +45

5x² = 45 | :5

x² = 9 | /9

x = 3

Answer 2

x=3,x=-3

Explanation:

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