joannabubu2008 joannabubu2008

03-09-2022
Mathematics

contestada

i need help with questions 12 and 13 please i dont understand this at all

i need help with questions 12 and 13 please i dont understand this at all class=

Respuesta :

jimrgrant1 jimrgrant1

03-09-2022

Answer:

3rd and 4th options

Step-by-step explanation:

(12)

(f + g)(x)

= f(x) + g(x)

= x - 2 + 5x - 1 ← collect like terms

= 6x - 3

(13)

(g • f)(x)

= g(x) × f(x)

= - 3x(6x² - 3x) ← multiply each term in the parenthesis by - 3x

= - 18x³ + 9x²

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