Kunci Jawaban MTKP Kelas X IPA
Latihan 1
Soal Tingkat Mudah
3.
9x^2 + x = 27x^2 - 1
Jawaban :
9x^2 + x = 27x^2 - 1
32(x^2 + x) = 33(x^2 - 1)
2x2+ 2x = 3x2- 3
2x2- 3x2+ 2x + 3 = 0
- x2+ 2x + 3 = 0
(- x - 1)(x - 3) = 0
pembuat nol :
- x - 1 = 0
- x = 1
x = -1
x - 3 = 0
x = 3
HP : {-1, 3}
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