Evaluate 5

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

Result

a =  -8

Solution:

x=1 a=x27 x+12 x4=(1)27 (1)+12 (1)4=8x = -1 \ \\ a = x^2-7 \cdot \ x+12 \cdot \ x-4 = (-1)^2-7 \cdot \ (-1)+12 \cdot \ (-1)-4 = -8



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