Evaluate 5

Evaluate expression x²−7x+12x−4 when x=−1

Correct answer:

a =  -8

Step-by-step explanation:

$$\begin{gathered} x=-1 \\ a=x^2-7\cdot x+12\cdot x-4=(-1{)}^2-7\cdot (-1)+12\cdot (-1)-4=-8 \end{gathered}$$

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Matematik

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