Question

Find 'K' , if -2 is the zero of the polynomial
${x}^{2} - kx + 4$
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Answer 1

p(x)= x2-kx+4

-2 is the zero of the polynomial (Given)

so, p(-2)= (-2)² - k(-2)+ 4= 0

4+2k+4= 0

2k+8= 0

k= -8/2

k= (-4)

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