\(\frac{4x-8}{x+5}\)* \(\frac{25-^2}{2x-^2}\)thuc hien phep tinh nay ai giai giup mk vs

Tính roi rut gon:

A).2/7:4/5    b).3/8:9/4    c).8/21:4/7

D).5/8:15/8

Ai lam day du phep tinh va cach rug gon mik tick 2 cai lan

Thuc hien phep tinh(nhanh neu co the)

1024:2^4+140:(38+2^5)-49^22:7^21

dung 5 so 7 va cac phep toan de tao ra phep tinh co ket qua bang 10.tat nhien la se cho cac ban ghep cac so nua day! lam cang nhanh,tim cang nhieu phep tinh cang tot .cac ban giup minh nhe!

thuc hien phep tinh(1/2+3/4+7/8+15/16+31/32+63/64) -5 

ban nao lam duoc minh like cho>,<...........................!!!!!!!

Tim x: 3.2^x+2^x=16

(3x-2)^2+1/4=1/2

Thuc hien phep tinh: 5.(-0,2)^2+3/8.(9/2-2,5)^2-(-1/5)

Mn giup mk nha

Please

truoc day 5 nam tong so tuoi cua hai ba chau la 62 tuoi hien nay tuoi ba gap 7 lan tuoi chau . Tinh tuoi ba va tuoi chau hien nay .

lam chi tiet giup minh nhe .

cam on !

cac ban giup mh giai van de nay nhe 1  bn ten la thu choi rat than voi  chuc nhung tu khi chuc cat chuc thu len lam lop truong va ke tu do co bn nay toan dung ke de cuop lai chuc ma thu ko biet gi het nhung co 1 nay co chot phat hien ra co bn than yeu cua mh ham hai thu cac bn giup mh xem co bn nay nen lam gi ?

bai 1 :thuc hien phep tinh

a)\(\frac{-5}{2}:\left(\frac{3}{4}-\frac{1}{2}\right)\)      b)  \(11\frac{3}{13}-\left(2\frac{4}{7}+5\frac{3}{13}\right)\)     c)\(\left(\frac{-5}{24}+0,75+\frac{7}{12}\right):\left(-2\frac{1}{4}\right)^2\)

AI LAM NHANH VA DUNG THI MK SE TICK CHO NHA

MK DAG CAN GAP !!!!!!! CAC BAN LAM NHANH LEN NHA