Question

Diketahui f(x)=2x²-3a. Jikaf(4)=40, maka nilaia adalah...

Answer 1

F(x) = 2x² - 3a
f(4) = 40
maka

40 = 2(4)² - 3a
40 = 2(16) - 3a
40 = 32 - 3a
40 - 32 = 32 - 32 - 3a
8 = -3a
-8 = 3a
-8 : 3 = a
-8/3 = a
- 2  2/3 = a