Evaluate 5

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

Correct result:

a =  -8

Solution:

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Matematik
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https://www.hackmath.net/en/calculator/fraction?input=Evaluate+x2%E2%88%927x%2B12x%E2%88%924+when+x%3D%E2%88%921&submit=Calculate

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