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1. one of the zeros of quadratic polynomial (k-1) x2 + kx + 1 is -3 then the valu of k is.. ..... please give me only right answer this is a maths problem sum |
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Answer» n :One of the zeroes of quadratic polynomial (k-1)x² + kx + 1 is -3 then the value of k ISANSWER :k = 4/3Given :One of the zeroes of the polynomial (k-1)x² + kx + 1 is -3To find :Value of k Solution : Given quadratic polynomial, Let P(x) = (k-1)x² + kx + 1 ⇒ one of the zeroes = -3 So, when we substitute the value of x = -3 in the given quadratic polynomial, we get 0 i.e., p(-3) = 0 Put x = -3,⟹ (k-1)(-3)² +k(-3)+1 = 0 ⟹ (k-1)(9) - 3k + 1 = 0⟹ 9k − 9 − 3k + 1 = 0 ⟹ 6k − 8 = 0⟹ 6k = 8⟹ k = 8/6⟹ k = 4/3║The value of k is 4/3 |
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