4. the following are the characteristics of the quadratic inequalities except

a.it is a first degree equation

b.it contains a polynomial of degree 2

c.there should be an inequality symbol in the mathematical sentence

d.the numerical coefficient of the first term x² should not be equal to zero

5.in the quadratic inequality 5x²+8x-21>0 which is the quadratic term

a. x²
b. -21
c.8x
d5x²

pa answer po ako sa lahat​