Mathematics Class 10th Chapter-2 [Polynomials] Important 50 MCQ Question Answer
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Mathematics Class 10th Chapter-2 [Polynimals] Important 50 MCQ Question Answer
Que 6.) The polynomial (x2 + 1) has:
A) Two real and distinct zeroes
B) Two real and equal zeroes
C) No real zero
D) One real zero
Answer: Option C (No real zero)
Que 7.) If α and β are zeroes of (x2 - 6x + 5), then (α2 + β2) is:
A) 36
B) 26
C) 16
D) 25
Answer: Option B (26) = Formula: α2 + β2 = (α + β)2 - 2αβ = 62 – 2x5 = 36 - 10 = 26
Que 8.) Which of the following polynomials is divisible by (x-1)?
A) (x3 + 2x2 + x + 2)
B) (x3 + x2 + x + 1)
C) (x3 - x2 + x - 1)
D) (x3 + 2x2 + 2x + 1)
Answer: Option C (x3 - x2 + x - 1) = Remainder when x=1: (1-1+1-1=0)
Que 9.) If (x-2) is a factor of (kx3 - 3x2 + 7x - 6), then the value of (k) is:
A) 1
B) 2
C) 3
D) None of these
Answer: Option D (None of these) = Put the value of x=2 and equal to zero then answer will be 1/2 not the option
Que 10.) If the zeroes of a quadratic polynomial are equal, then its discriminant is:
A) Positive
B) Zero
C) Negative
D) Cannot say
Answer: Option B (Zero)
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