Question

2. Diketahui :

f(x) = x – 3

g(x) = 2x2 – 6x

b(x) = x2 – 9

m(x) = 2x2 – x – 15



g(x) + m(x) = … .

A. 4x2 – 6x + 9

B. 4x2 – 7x – 15

C. 4x2 – 5x – 9

D. 4x2 – 7x + 15

E. 4x2 – 7x – 9

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Answer 1

Jawaban:

B

Penjelasan dengan langkah-langkah:

g(x) = 2x² – 6x

m(x) = 2x² – x – 15

g(x) + m(x) = (2x² – 6x) + (2x² – x – 15)

g(x) + m(x) = 2x² + 2x² – 6x – x – 15

g(x) + m(x) = 4x² – 7x – 15

Answer 2

Penjelasan dengan langkah-langkah:

= g(x) + m(x)

= 2x² - 6x + 2x² - x - 15

= 2x² + 2x² - 6x - x - 15

= 4x² - 7x - 15 (b)