Question 389284
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Hi,         
Process is completed by substituting value given for x
f(x) = 4x + 10
f(2) = 4*2 + 10 = 18
f(-3) = 4*-3 + 10 = -2
f(k) = 4*k + 10 = 4k + 10
f(k^2-1) = 4(k^2-1) + 10 = 4k^2 - 4 + 10 = 4k^2 + 6