Let α andβ are the roots of the equation pχ2 + qχ + r = 0, p ≠ 0. If p, q and r are in AP and

Which system of equations can be used to find the roots of the equation ?

A. and  

B. and  

C. and  

D. and   

6. (11 marks) If b2 - 4c > 0, then the equation za + bx +c=0 has two real unequal roots. Let f(b,c) be the larger of these roots. a) Write down a formula for f(b, c). b) It is easy to verify that -1 is the larger of the two roots of za +50+4 = 0. Use a suitable linear approximation to f(b, c) to estimate the larger of the roots to the equation x2 +0.5x + 4.06 = 0.(No credit will be given for a method that does not use linear approximation.) Answer

if the discriminant of a quadratic equation is 4, which statement describes the roots?

A) There are two complex roots.
B) There are two real roots.
C) There is one real root.
D) There is one complex root