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Mathematics, 06.05.2020 05:37 datboyjulio21

If x= -9 is one zero of the quadratic function y= x2 +kx -18 then what is the value of 'k'?

a) -7
b) 7
c) -2
d) 2

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If x= -9 is one zero of the quadratic function y= x2 +kx -18 then what is the value of 'k'?
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