Question

Find f(a + 7).
f(x) = x² + 5

Answer 1

hi

f(a+7)

f(x) =x²+5

by remplacing X by (a+7) :

then f(a+7) = (a+7)²+5

= a² +2*a*7 +49 +5

= a² +14a +54