Rút gọn B

vN cho Advat1) B
15-x
1
15-√x+2
√x +9
(ISIS)
X-25 √√x+5√ √₂₁-5
XH10; X + 25
ay tinh Akhir-g
by Rut you m
fj tim i tz, dép - A.B EZ