Question

Tolong banget dijawab yahh...butuh cepat:)

Answer 1

24.
y  = 2x²  - x + p
(2,2) --> x = 2, y = 2
2 = 2(2)²  - (2) + p 
2 = 8-2 +p
2 = 6+p
p = 2-6 
p = - 4

25.
f(x)= 5x + 1
g(x) = 3(2x-1)  = 6x - 5
(f-g)(x) = f(x) - g(x) 
(f-g)(x) = 5x + 1 - (6x - 5) = 5x +1 - 6x + 5
(f-g)(x) = - x + 6

26.
f(x)  = ax + b
f(-4) = - 3 
f(2) = 9
...................(-)
(-4 - 2) a = -3 - 9
-6a = - 12
a = 2

f(2) =9  --> b = 9 - 2a
b = 9-2(2)= 9-4
b = 5

nilai 2a +b = 2(2) + 5 = 
2a + b = 4 + 5
2a + b  = 9