3, 4
±3
±5
±6
Correct answer is D
For equal roots, we have that \(b^{2} = 4ac\), so, given a=1, b = -k and c = 9,
\((-k)^{2} = 4\times1\times9 \implies k^{2} = 36\)
\(k = \sqrt{36} = \pm6\)
Two functions f and g are defined by \(f : x \to 3x - 1\) and \(g : x \to 2x^{3}\), evaluate \(fg(-2...
If \(x^{2} - kx + 9 = 0\) has equal roots, find the values of k....
Two balls are drawn, from a bag containing 3 red, 4 white and 5 black identical balls. Find the prob...
(\(\frac{3√6}{√5} + \frac{√54}{3√5}\))\(^{-1}\)...
Two functions f and g are defined on the set R of real numbers by \(f : x \to 2x - 1\) and \(g : x \...
Forces of magnitude 8N and 5N act on a body as shown above. Calculate, correct to 2 dp, the angle th...
The area of a sector of a circle is 3\(cm^{2}\). If the sector subtends an angle of 1.5 radians at t...
A particle starts from rest and moves in a straight line such that its velocity, v, at time t second...
Which of the following quadratic curves will not intersect with the x- axis? ...
The mean heights of three groups of students consisting of 20, 16 and 14 students each are 1.67m, 1....
Logical Reasoning Questions and Answers
Nigeria General Knowledge Questions and Answers
Quantitative Reasoning Questions and Answers
Personality Test
Typing Speed and Accuracy Test
Situational Judgement Questions and Answers
Abstract Reasoning Questions and Answers
Data Interpretation Questions and Answers
Verbal Reasoning Questions and Answers
Numerical Reasoning Questions and Answers
Puzzles Questions and Answers
Spatial Reasoning Questions and Answers
Microsoft Office Questions and Answers
See all →