Question

please answer this question Q7 and Q8​

Answer 1

Question 7

• True or False : 2 is one zero at p(x) = x² - 6x + 8 polynomial.

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Answer -

• True

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Explanation :-

• Put x = 2

➝ p(x) = x² - 6x + 8

➝ p(2) = (2)² - 6(2) + 8

➝ p(2) = 4 - 12 + 8

➝ p(2) = 12 - 12

➝ p(2) = 0

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Thus, 2 is one zero of the given polynomial.

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Question 8

• True or false : If 3 is one zero at p(x) = x² - 11x + k then k = 24.

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Answer -

• True

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Explanation :-

• Put x = 3

➝ p(x) = x² - 11x + k

➝ p(3) = (3)² - 11(3) + k

➝ p(3) = 9 - 33 + k

➝ p(3) = k - 24

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It is given that 3 is a zero of polynomial, then

• put p(3) = 0

➝ k - 24 = 0

➝ k = 24

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Thus, value of k is 24.

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