Answer:
2) slant height=15
surface area=
Step-by-step explanation:
x
81+144
=225
=15
3x² - 6
note that (f + g)(x) = f(x) + g(x), thus
f(x) + g(x)
= 2x² + 1 + x² - 7 ← collect like terms
= 3x² - 6
(-1, 4) , (0, 6), (1, 9), (2, 13.5)
