Which of the following is an example of the quadratic polynomial?
a) 7x+3
b)2x2+x-1
c) x+3x3-9
d) None of these
Explanation:2x2+x-1 is a quadratic polynomial because the highest degree of the polynomial is 2.
Find the value of 72-52.
a) 22
b) 23
c)24
d) 25
Explanation:72-52 = 49 – 25 = 24.
If x2+kx+6 = (x+2)(x+3) for all k, find the value of k.
a) -1
b) 1
c) 3
d)5
Explanation:x2+kx+6 = (x+2)(x+3)
x2+kx+6 = x2+3x+2x+6
x2+kx+6 = x2+5x+6
Hence, the value of k is 5.
What is the zero of the polynomial p(x)=cx+d?
a)–c
b)–d
c)-d/c
d) d/c
Explanation:The zero of the polynomial p(x)= cx+d is -d/c.
cx+d = 0 cx = -d
x = -d/c.
The zero of the polynomial p(x) = -5x+5 is
a) 0
b) -5
c) -1
d)1
Explanation:p(x) = -5x+5
-5x+5 = 0 -5x = -5
x = -5/-5 =1
Which of the following is a constant polynomial?
a) 4x+1
b) 3
c) 2x2
d) 6x+3
Explanation:3 is a constant polynomial, as 3 = 3x0. Whereas 4x+1 and 6x+3 are linear polynomial and 2x2 is a quadratic polynomial.
