Question

the quadratic polynomial x + 3x + k is 2, then find the value of k?​

Answer 1

Answer:

k=−10

Step-by-step explanation:

${x}^{2} + 3x + k = 2 \\ \\ 2 \: is \: the \: zero \: of \: {x}^{2} + 3x + k \\ \\ thus \: {(2)}^{2} + 3(2) + k = 0 \\ \\ k + 10 = 0 \\ \\ k = - 10$

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