Your answer is going to be X=-6
Answer:
1.22 x 
Step-by-step explanation:
1,220,000 would be...
1.22 x 10^6
5x^2-45=0
<em>*Add 45 to both sides*</em>
5x^2=45
<em>*Divide both sides by 5*</em>
x^2=9
<em>*Take the square root of both sides*</em>
x=+/-9
Hope this helps!!