Question

Diket Rumus Fungsi f(x) = ax + b.Bila Nilai f(5) = 0 dan f(-5) = -30,maka nilai dari (b + 3a)Kuadrat,Adalah

Answer 1

1. f(5) = 5a + b = 0
2. f(-5) = -5a + b = -30
3. Eliminasi
a = 3
b = -15
4. (-15 + 3(3))^2 = 36

Answer 2

5a + b = 0
-5a + b = -30
---------------------- -
10a = 30
a = 3

sub ⇒ 5a + b = 0
          5.3 + b = 0
          15 + b = 0
           b        = -15
jadi,  (b + 3a)^2 = (-15 + 3.3)^2
                      = (-15 + 9)^2
                      = (-6)^2 = 36

semoga membantu ;) sorry klo salah