If the equation ax2 + bx + c = 0 (a > 0) has two real roots α and β such that α<−2 and β>2, then which of the following statements is/are true?
a−|b|+c<0
c<0,b2−4ac>0
4a−2|b|+c<0
9a−3|b|+c<0
f(x)=ax2+bx+c f(0)=c<0,D>0⇒ b2−4ac>0 f(1)<0 and f(−1)<0⇒ a−|b|+c<0 f(2)<0 and f(−2)<0⇒ 4a−2|b|+c<0
Nothing can be said about f(3) or f(-3), whether it is positive or negative.