Pls answer this ASAP please please

What are the sotions to the quadratic equation 9x^2=4

If your annual gross income is $62,000 and you have one monthly car payment of $335 and a monthly student loan payment of $225, what is the maximum house payment you can afford. consider a standard 28% front-end ratio and a 36% back-end ratio. also, to complete your calculation, the annual property tax will be $3,600 and the annual homeowner's premium will be $360.

[10 points, algebra 2]according to my answer key the restrictions are -1 and 4. but why not positive 1?