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Kelas 10 MatematikaBab Logaritma
^ = pangkat
x² + 3x + 1 = 5
x² + 3x + 1 - 5 = 0
x² + 3x - 4 = 0
(x + 4) (x - 1) = 0
x + 4 = 0
x = -4
x - 1 = 0
x = 1
x >= 0
²log (2x^3 - x² + 7)
= ²log (2 . 1^3 - 1² + 7)
= ²log (2 - 1 + 7)
= ²log 8
= ²log 2^3
= 3 . ²log 2
= 3
✩✩ C ✩✩