Question

Diketahui f(x)=5-x² pada himpunan bilangan bulat. a. tentukan bayangan dari, 3, -2, dan -5
b. berapa nilai x, jika f(x)=-11 ? tolong dijawab ya...

Answer 1

F(x) = 5 - x²
f(3) = 5 - 3² = (-4)
f(-2) = 5 - (-2)² = 1
f(-5) = 5 - (-5)² = (-20)
f(x) = 5 - x²
-11 = 5 - x²
x² = 5 + 11
x = √16 = 4cm