125 x 2 + 2 x 125 - 3 x 5 x 125

= 125 x 2 + 2 x 125 - 15 x 125

= 125( 2 + 2 - 15 )

= 125 x ( -11 )

= -1375

125 x 2 + 2 x 125 - 3 x 5 x 125 

125 x 2 + 2 x 125 - 15 x 125 

125 x ( 2 + 2 -15 ) 

125 x ( - 11 ) = ( - 1357 ) 

Học tốt 

   125 . 2 + 2 . 125 - 3.5.125

= 250 + 250 - 1875

= 500 -1875

= -1375

1000 - 115 - 230 - 185 - 270

= 1000 - ( 115 + 185) - ( 230 + 270 )

= 1000 - 300 - 500

= 700 - 500

= 200

ok em

1000 - 115 -230 -185 - 270 

885 -230  - 185 - 270 

655 - 185 - 270 

470 - 270 

200 

Học ttót

\(1000-115-230-185-270\)

\(=1000-\left(115+185\right)-\left(230+270\right)\)

\(=1000-300-500\)

\(=700-500\)

\(=200\)

_Chúc bạn học tốt_

1000 - 115 - 230 - 185 - 270

= 1000 - ( 115 + 185 ) - ( 230 + 270 )

= 1000 - 300 - 500

= 700 - 500

= 200

200

đúng ko

1000-115-230-185-270

= 1000-(115+185)-(230+270)

= 1000-300-500

= 700-500

=200

nha  

c hịu

đâu là x và đâu là nhân hả Đinh Khánh Ngọc

1x5+4x-78=100

5+4x-78=100

5+4x=178

4x=173

x=173/4

Vậy x=173/4

1x5 + 4x - 78 = 100

5+4x - 78=100

5+4x=100+78

5+4x=178

4x= 178-5

4x= 173

x=173:4

x= \(\frac{173}{4}\)

\(\int^{x\sqrt{y}+y\sqrt{x}=30}_{x\sqrt{x}+y\sqrt{y}=35}\Leftrightarrow\int^{\sqrt{xy}\left(\sqrt{x}+\sqrt{y}\right)=30}_{\left(\sqrt{x}+\sqrt{y}\right)^3-3\sqrt{xy}\left(\sqrt{x}+\sqrt{y}\right)=35}\)

\(\Leftrightarrow\int^{\sqrt{xy}\left(\sqrt{x}+\sqrt{y}\right)=30}_{\left(\sqrt{x}+\sqrt{y}\right)^3-90=35}\Leftrightarrow\int^{\sqrt{xy}=6}_{\sqrt{x}+\sqrt{y}=5}\)

1291786020

(49×427×49)×1260

=(49×49×427)×1260

=(2401×427)×1260

=1025227×1260

=1 291 786 020

    (49x427x49)x1260=?

=   (2401x 427) x 1260

=    10252227x1260

=    1291786020

Taco:VD:2.3.4.5>24=>x<0

x=-2=>tổng=0

Vayx=-1

\(\left(x+2\right)\left(x+3\right)\left(x+4\right)\left(x+5\right)=24\)

\(\Leftrightarrow\left(x+1\right)\left(x+6\right)\left(x^2+7x+16\right)=0\)