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mylen [45]
3 years ago
14

Find the following f(x)=x^2 - 4x - 12 A) f(a+2) B) f(a+h)

Mathematics
1 answer:
NikAS [45]3 years ago
6 0

(A) f(a + 2) = a² - 16

substitute x = a + 2 into f(x)

f(a + 2) = (a + 2)² - 4(a + 2) - 12

           = a² + 4a + 4 - 4a - 8 - 12

           = a² - 16

(B ) f(a + h) = a² + 2ah + h² - 4a - 4h - 12

substitute x = a + h into f(x)

f(a + h) = a² + 2ah + h² - 4a - 4h - 12


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