A=4 b=-3 2ab2-5a²b = ... (A) -168 (B) 72 (C) 168 (D) 312

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

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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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