MATHEMATICS · Single correct · A Level · Mathematics · Algebra and Functions · Algebra and Functions
Problem
If quadratic equation ax2+bx+c=0 does not have real roots, then which of the following may be false :
(a) a(a−b+c)>0
(b) c(a−b+c)>0
(c) b(a−b+c)>0
(d) (a+b+c)(a−b+c)>0