Question

if sum of the zero of the quadratic polynomial 2x^2-kx+1 is 2 then find value of k​

Answer 1

Answer:

$\alpha + \beta = 2 \\ and \\ \alpha + \beta = - ( - k) \div 2 \\ \alpha + \beta = k \div 2 \\ \\ so \\ k \div 2 = 2 \\ k = 4$

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