Question

Soal

f(b) = b² - 8(2b + 3)
f(2) = ..
f(4) = ..

Mohon bantuannya
Tidak ngasal
Tidak memakai kalkulator
Pakai cara yang lengkap → BA​

Answer 1

f(b) = b² - 8(2b + 3)

f(2) = 2² - 8((2(2) + 3)

f(2) = (2 × 2) - 8(4 + 3)

f(2) = 4 - 8(7)

f(2) = 4 - 56

f(2) = -52

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f(b) = b² - 8(2b + 3)

f(4) = 4² - 8((2(4) + 3)

f(4) = (4 × 4) - 8(8 + 3)

f(4) = 16 - 8(11)

f(4) = 16 - 88

f(4) = -72

Answer 2

Penjelasan dengan langkah-langkah:

f(b) = b² - 8(2b + 3)

• nilai masing-masing dari f(2) & f(4) = ...

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Nilai f(2):

f(b) = b² - 8(2b + 3)

f(2) = 2² - 8(2(2) + 3)

f(2) = (2.2) - 8(2(2) + 3)

f(2) = 4 - 8((2.2) + 3)

f(2) = 4 - 8(4 + 3)

f(2) = 4 - 8(7)

f(2) = 4 - (8.7)

f(2) = 4 - 56

f(2) = - 52

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Nilai f(4):

f(b) = b² - 8(2b + 3)

f(4) = 4² - 8(2(4) + 3)

f(4) = (4.4) - 8(2(4) + 3)

f(4) = 16 - 8((2.4) + 3)

f(4) = 16 - 8(8 + 3)

f(4) = 16 - 8(11)

f(4) = 16 - (8.11)

f(4) = 16 - 88

f(4) = - 72

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