No. 9 Tolong bantu teman2

^4 log (2x²-3x+7) = 2
^4 log (2x²-3x+7) = ^4 log 4²
2x² – 3x + 7 = 4²
2x² – 3x + 7 – 16 = 0
2x² – 3x – 9 = 0
(2x + 3)(x – 3) = 0
x1 = -3/2  x2 = 3
4×1.x2 = 4(-3/2)(3) = -18