A=4 b=-3 2ab2-5a²b = … (A) -168 (B) 72 (C) 168 (D) 312
Jika
a = 4
b = – 3
Maka
2ab2 – 5a²b
- 2(4)(-3)(2) – 5(4)²(-3)
- 8(-3)(2) – 5(16)(-3)
- (-24)(2) – 5(16)(3)
- (-48) – 5(48)
- (-48) – 240
- 192
SOAL 1
___________________________________________
2ab2 – 5a²b
a → 4
b → -3
___________________________________________
2(4)(-3)2 – 5(4²)(-3)
= 8(-6) – 5(16)(-3)
= -48 – 80(-3)
= -48 – (-240)
= -48 + 240
= 192
No Opsi
___________________________________________