732-132-102+20.13
=5329-169-100+260
=5329-(169+100)+260
=5329-269+260=5320
`= 73^2 - (13^2 - 2 . 10 . 13 + 10^2)`
`= 73^2 - 3^2`
`= 5329 - 9 = 5320`
732-132-102+20.13
=5329-169-100+260
=5329-(169+100)+260
=5329-269+260=5320
`= 73^2 - (13^2 - 2 . 10 . 13 + 10^2)`
`= 73^2 - 3^2`
`= 5329 - 9 = 5320`
Bài 1 Tính
a, 12/21-3/7+-2/3
b,(-25/13)+(-9/17)+12/13+(-25/17)
c,5/9.7/13+5/9.9/13-5/9.3/13
Bài 2 tìm x
a,2/3x+5/7=3/10
b,x:5/2-1/2=-2/3
c,|x-3/4|-1/2=0
(x+2/)10^10)+(x+2)/11^11)=(x+2)/12^12)+(x+2)/13^13)
tinh giá trị biểu thức A=[(2^22*13+13+2*12*65)/(2^10*10^4)]+[(3^10*11+3^10*5)/(3^)9*2*4)]
\(^{x-\frac{20}{20.13\frac{ }{ }}-\frac{20}{13.15}-\frac{20}{15.17}}\)
Rút gọn\(A=-\frac{3^9+2^3\times3^7-2^{10}-3^2+2^{13}}{2^2\times3^7-3^{10}+2^{12}-2^{10}-3^{13}}\)
Tìm x biết : x+2/10^10+x+2/11^11=x+2/12^12+x+2/13^13
tim x biet (x+2)/10^10+(x+2)/11^11=(x+2)/12^12+(x+2)/13^13
Tìm x:
2x+7/6+13/12+21/20+31/30+43/42+57/56+73/72+91/90=10
thực hiện phép tính:
a) 3/13 - 3/2 + 10/13
b) 4/7 - (-2/7) - 7/3
c) 2/3 - -1/6 +5/4
giúp tôi giải bài này tôi giải mãi ko đk
tim x biet x+2/10^10 = x+2/11^11=x +2/12^12=x+2/13^13