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Published on: 14/09/2019
Polynomials
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Questions + Answers key
Take MCQ Mathematics Test

1.
Using remainder theorem, factorise: \(2x^3-13x^2+26x-15\)
2.
For what value of k, (x+1) is a factor of \(p(x)=kx^2-x-4?\)
3.
Find the value of k such that (x-1) is a factor of \(5x^3+4x^2-6x+2k.\)
4.
Factorise \(y^2-5y+6\) by using the Factor Theorem.
5.
Examine whether x+2 is a factor of \({ x }^{ 3 }+3{ x }^{ 2 }+5x+6\) and 2x+4.
6.
Polynomials \(kx^3+3x^2-3\) and \(2x^3-5x+k\), when divided by (x-4) leave the same remainder in each case. Find the value of k.
7.
If the polynomial \(f(x)=x^4-2x^3-9x+3a-7,\)when divided by x+1 leaves the remainder 20, then find the value of a. Also, find the remainder when f(x) is divided by x+2.
8.
If the polynomial \(p(x)=x^4-2x^3+3x^2-ax+8\)is divided by (x-2), it leaves a remainder 10, Find the value of a.
9.
Find the remainder, when \(x^3-3x^2+3x-1\) is divided by(x-1)
10.
Find a zero of the polynomial p(x)=2x+1
11.
Point out which of the following polynomials are monomials, binomials or trinomials?
\({ x }^{ 3 }+2x-3\)
12.
Find the degree of the polynomials given below:
\(2-{ y }^{ 2 }-{ y }^{ 3 }+{ 2y }^{ 8 }\)
13.
Write the coefficient of x3 of the following polynomials:
\(4x+{ x }^{ 3 }+{ x }^{ 6 }-{ 7x }^{ 2 }\)
14.
Write the coefficient of x3 of the following polynomials:
\(1+{ x }^{ 2 }+{ x }^{ 4 }-x-{ x }^{ 3 }\)
1.
(x-1)(x-3)(2x-5)
2.
3
3.
\(-\frac{3}{2}\)
4.
(y-2)(y-3)
5.
The zero of x + 2 is –2. Let p(x) = x3 + 3x2 + 5x + 6 and s(x) = 2x + 4
Then, p(–2) = (–2)3 + 3(–2)2 + 5(–2) + 6
= –8 + 12 – 10 + 6
= 0
So, by the Factor Theorem, x + 2 is a factor of x3 + 3x2 + 5x + 6.
Again, s(–2) = 2(–2) + 4 = 0
So, x + 2 is a factor of 2x + 4. In fact, you can check this without applying the Factor Theorem, since 2x + 4 = 2(x + 2).
6.
1
7.
4, 67
8.
10
9.
0
10.
\(\left(-\frac{1}{2}\right)\)
11.
trinomial
12.
8
13.
1
14.
-1
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