A quadratic polynomial, whose zeroes are –3 and 4, is

(A)x 2 – x + 12   (B) x 2 + x + 12

(C) x 2 /2 − x/2 − 6  (D) 2x 2 + 2x − 24

NCERT Exemplar - A quadratic polynomial, whose zeroes are –3 and 4, is - MCQs from NCERT Exemplar

part 2 - Question 4 - MCQs from NCERT Exemplar - Serial order wise - Chapter 2 Class 10 Polynomials

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Transcript

Question 4 A quadratic polynomial, whose zeroes are –3 and 4, is x2 – x + 12 (B) x2 + x + 12 (C) š‘„^2/2 āˆ’ š‘„/2 āˆ’ 6 (D) 2x2 + 2x āˆ’ 24 The required quadratic polynomial is (x āˆ’ (āˆ’3)) (x āˆ’ 4) = (x + 3) (x āˆ’ 4) = x (x āˆ’ 4) + 3 (x āˆ’ 4) = x2 āˆ’ 4x + 3x āˆ’ 12 = x2 āˆ’ x āˆ’ 12 Dividing by 2 = 1/2 Ɨ (x2 āˆ’ x āˆ’ 12) = š‘„^2/2 āˆ’ š‘„/2 āˆ’ 6 So, the correct answer is (C)

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