5x^2-45=0
*Add 45 to both sides*
5x^2=45
*Divide both sides by 5*
x^2=9
*Take the square root of both sides*
x=+/-9
Hope this helps!!
Answer:
+-3
Step-by-step explanation:
1. Add 45 to each side: 5x^2=45
2. Divide 5 on each side: x^2=9
3. Square root both sides: x= +-3
