f(x) = x² + 4x - 15x
f(5) = ...
____________________
→ Pakai cara
→ BA utk gelar yg terendah
f(5) = ...
____________________
→ Pakai cara
→ BA utk gelar yg terendah
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f(x) = x² + 4x - 15x
f(5) = 5² + 4(5) - 15(5)
f(5) = 25 + 20 - 75
f(5) = 45 - 75
f(5) = -30
Penyelesaian :
f(x) = x^2 + 4x - 15x
f(5) = 5^2 + 4(5) - 15(5)
f(5) = (5 × 5) + (4 × 5) - (15 × 5)
f(5) = 25 + 20 - 75
f(5) = 45 - 75
f(5) = -30