tell whether the following is a quadratic inequality or not. if it is, write QI; if it is not write NQI.
1.) -2x² < 8
2.) 5(5x+7)>7
3.) 7x²-15>7(2x²+5x)
4.) 0.1x²+2.3x<-4
5.) -3x-5<2x²​