tolong soal matematika saya

6. f(x) = 2x+3
a. f(x+2) = 2x+3
= 2(x+2) + 3
=2x + 4+ 3
=2x + 7

b. f(2x) = 2x+3
= 2(2x) + 3
= 4x + 3

c. f(x-5) = 2x+3
= 2(x-5) + 3
= 2x - 10 + 3
= 2x - 7

d. f(3x+1) = 2x+3
= 2(3x+1) + 3
= 6x + 2 + 3
= 6x + 5

e. f(2x-4) = 2x+3
= 2(2x-4) + 3
= 4x - 8 + 3
= 4x - 5

7). f(x) = 2x-1
a. f(x+1) = 2x-1
= 2(x+1) - 1
= 2x + 2 - 1
= 2x +1

b. f(x-2) = 2x-1
= 2(x-2) - 1
= 2x - 4 - 1
= 2x - 5

c. f(2x) = 2x-1
= 2(2x) - 1
= 4x - 1

d. f(2x-3) = 4x² + 10
= 4(2x-3)² + 10
= 4(4x² - 12x + 9) + 10
= 16x² - 48x + 46

e. f(3x+1) = 9x² + 6x - 8
= 9(3x+1)² + 6(3x+1) - 8
= 81x² + 54 + 9 + 18x + 6 - 8
= 81x² + (54 + 18)x + (9 + 6 - 8)
= 81x² + 72x + 7


Maaf kalau salah.
Semoga membantu ^_^