Jika f(x + 4) = x² + 5x + 6, maka nilai dari f(-2) adalah…

Jawaban:

f(x + 4) = x² + 5x + 6

f(-2) = ?

x + 4 = -2

x = -2 – 4

x = -6

f(-2) = x² + 5x + 6

f(-2) = (-6)² + 5(-6) + 6

f(-2) = 36 – 30 + 6

f(-2) = 12

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f(x + 4) = x² + 5x + 6

f(-2) = x² + 5x + 6

f(-6 + 4) = (-6)² + 5(-6) + 6

f(-2) = 36 – 30 + 6

f(-2) = 12