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