Question

Tolong bantu jawab soal no.2

Answer 1

2) f(x)=x²-2x
f(-3)=(-3)² - 2(-3)=9 + 6=15
f(-2)=(-2)² - 2(-2)= 4 + 4=8
f(-1)=(-1)² - 2(-1)= 1 + 2=3
f(0)=(0)² - 2(0)= 0
f(1)=(1)² - 2(1) = (-1)
f(2)=(2)² - 2(2) = 0
f(3)=(3)² - 2(3)= 3
hasil {15,8,3,0,-1,0,3}
2) f(x) = 15
15 = x² - 2x
x² - 2x - 15 = 0
(x - 5)(x + 3)
x=5 atau x= -3
3) f(x)=x² - 2x
= (-10)² - 2(-10)
= 100 + 20 = 120