Polynomials Test-02
Polynomials Test-02
This is Polynomials Test-02 for CBSE class 10 Maths.. There are 15 questions in this test with each question having around four answer choices.
Questions & Answers
1
If ‘α’ and ‘β’ are the zeroes of a quadratic polynomial\({x^2} + {\text{ }}5x{\text{ }}--{\text{ }}5\) , then
- A\(\alpha {\text{ }} + {\text{ }}\beta {\text{ }} < {\text{ }}\alpha \beta \)
- B\(\begin{array}{*{20}{l}} {\alpha {\text{ }}--{\text{ }}\beta {\text{ }} = {\text{ }}\alpha \beta } \end{array}\)
- C\(\alpha {\text{ }} + {\text{ }}\beta {\text{ }} > {\text{ }}\alpha \beta \)
- D\(\begin{array}{*{20}{l}} {\alpha {\text{ }} + {\text{ }}\beta {\text{ }} = {\text{ }}\alpha \beta } \end{array}\)Correct
2
If ‘\(\alpha \) ’ and ‘\(\beta \) ’ are the zeroes of a quadratic polynomial \({x^2}--{\text{ }}5x{\text{ }} + {\text{ }}b\) and\(\alpha {\text{ }}--{\text{ }}\beta {\text{ }} = {\text{ }}1\) , then the value of ‘b’ is
- A– 5
- B– 6
- C5
- D6Correct
3
If one zero of the quadratic polynomial ${x^2} + {\text{ }}3x{\text{ }} + {\text{ }}k$ is 2, then the value of ‘k’ is
- A– 5
- B5
- C10
- D– 10Correct
4
If two of the zeroes of a cubic polynomial \(a{x^3} + b{x^2} + cx + d\) are zero, then the third zero is
- A\(\frac{d}{a}\)
- B\(\frac{b}{a}\)
- C\(\frac{{ - b}}{a}\)Correct
- D\(\frac{c}{a}\)
5
A quadratic polynomial whose zeroes are – 3 and 6, is
- A${x^2} - 3x + 18$
- B${x^2} + 3x + 18$
- C$\frac{{{x^2}}}{6} - \frac{x}{2} - 3$Correct
- D${x^2} + 3x - 18$
6
The zeroes of a polynomial \({x^2} + 5x + 6\) are
- Aboth equal
- Bboth positive
- Cone positive and one negative
- Dboth negativeCorrect
7
The zeroes of a polynomial \({x^2} + 5x - 24\) are
- Aboth equal
- Bboth negative
- Cboth positive
- Done positive and one negativeCorrect
8
The zeroes of a polynomial \({x^2} - 7x + 12\) are
- Aboth negative
- Bone positive and one negative
- Cboth positiveCorrect
- Dboth equal
9
The zeroes of a polynomial \({x^2} + 4x + 4\) are
- Aboth equalCorrect
- Bboth negative
- Cboth positive
- Done positive and one negative
10
If the zeroes of a quadratic polynomial ax2 + bx + c, c ≠ 0 are equal, then
- Ab and c have opposite sign
- Bb and c have the same sign
- Cc and a have opposite sign
- Dc and a have the same signCorrect
11
If a real number ‘\(\alpha \) ’ is a zero of a polynomial, then ______ is a factor of f(x).
- A\(x \pm \alpha \)
- Bnone of these
- C\(x + \alpha \)
- D\(x - \alpha \)Correct
12
If ‘\(\alpha \)’ and ‘\(\beta \)’ are the zeroes of the polynomial \(3{x^2} + 11x - 4\), then the value of \({\alpha ^2} + {\beta ^2}\) is
- A\(\frac{{144}}{9}\)
- B\(\frac{{145}}{9}\)Correct
- C\(\frac{{150}}{9}\)
- Dnone of these
13
If ‘\(\alpha \)’ and ‘\(\beta \) are the zeroes of the polynomial \(3{x^2} + 11x - 4\), then the value of \(\frac{1}{\alpha } + \frac{1}{\beta }\) is
- A\(\frac{{12}}{4}\)
- Bnone of these
- C\(\frac{{13}}{4}\)
- D\(\frac{{11}}{4}\)Correct
14
If ‘\(\alpha \)’ and ‘\(\beta \)’ are the zeroes of the polynomial \({x^2} - 6x + 8\), then the value of \({\alpha ^3} + {\beta ^3}\) is
- A80
- B72Correct
- C74
- D76
15
If ‘\(\alpha \)’ and ‘\(\beta \)’ are the zeroes of the polynomial \({x^2} - 6x + 8\), then the value of \(\frac{{{\alpha ^2}}}{\beta } + \frac{{{\beta ^2}}}{\alpha }\) is
- A8
- B9Correct
- C12
- D6