No. 9 Tolong bantu teman2
Matematika
pricillia10
Pertanyaan
No. 9
Tolong bantu teman2
Tolong bantu teman2
1 Jawaban
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1. Jawaban nuuraziizah
[tex] {}^{4} log(2 {x}^{2} - 3x + 7) = 2 \\ {}^{4} log_{}(2 {x}^{2} - 3x + 7 ) = {}^{4} log {4}^{2} \\ 2 {x}^{2} - 3x + 7 = {4}^{2} \\ 2 {x}^{2} - 3x + 7 = 16 \\ 2 {x}^{2} - 3x + 7 - 16 = 0 \\ 2 {x}^{2} - 3x - 9 = 0 \\ (2x + 3)(x - 3) = 0 \\ \\ 2x + 3 = 0 \\ 2x = - 3 \\ x = - \frac{3}{2} \\ \\ x - 3 = 0 \\ x = 3 \\ \\ 4x1x2 = 4. \times ( - \frac{3}{2} \times ( 3) = - 18[/tex]