Math, asked by kanhaiyakr9926, 1 year ago

pls answer hastily ​

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Answered by Anonymous
7

\mathsf{Given}

\mathsf{p(x) = 2x^2 + kx + 2}

Comparing with the form ax² + bx + c

\mathsf{a = 2, \: b = k \: c = 2}

\mathsf{For p(x) = 0}

\mathsf{\implies\: Discriminant (D) = 0}

\mathsf{\implies\: b^2 - 4ac = 0}

\mathsf{\implies\: (k)^2 - 4(2)(2)= 0}

\mathsf{\implies\: k^2 - 16 = 0}

\mathsf{\implies\: k = ± \sqrt{16}}

\mathsf{\implies\: k = ±4}

Option (B) : ±4

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