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27-10-2022
Mathematics

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t(x) = -x² + 7x + 1 and r(x) = 5x² –2x + 8. Find (t–r) (2).(Choices)A.18 B.-18 C.-13 D.13

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MalaysiaK115382 MalaysiaK115382

27-10-2022

Solve the substraction of the functions and then evaluate the result in x=2

[tex]\begin{gathered} t-r=-x^2+7x+1-(5x^2-2x+8) \\ =-x^2-5x^2+7x+2x+1-8 \\ =-6x^2+9x-7 \end{gathered}[/tex][tex]undefined[/tex]

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