a) ( 75  - 3 2  -  12 )( 3  +  2 )

=(5 3 - 3 2 - 2 3 )( 3  +  2 )

=3( 3  -  2 )( 3  +  2 ) = 3

Ta có: \(\sqrt{12}+2\sqrt{27}+3\sqrt{75}-9\sqrt{48}\)

\(=2\sqrt{3}+6\sqrt{3}+15\sqrt{3}-36\sqrt{3}\)

\(=-13\sqrt{3}\)

\(\sqrt{12}+2\sqrt{27}+3\sqrt{75}-9\sqrt{48}\\ =2\sqrt{3}+6\sqrt{3}+15\sqrt{3}-36\sqrt{3}=-13\sqrt{3}\)

a: \(=5\cdot5\sqrt{3}-\dfrac{1}{3}\cdot3\sqrt{3}=24\sqrt{3}\)

b: \(=\dfrac{12\left(3+\sqrt{5}\right)}{4}=9+3\sqrt{5}\)

c: \(=3-\sqrt{5}+\sqrt{5}=3\)

a ) = 37.[ ( - 75 ) - 25 ] = 37 .( - 100 ) = - 3700

b ) = 36 + ( - 90 ) + ( - 8 ) = - 62

a)=37.(-75)+37.(-25)

=37.[(-75)+(-25)]

=37.(-100)

=-3700

mình nha

a) 37.(-75)+(-37).25=(-37).75+(-37).25=(-37).(75+25)=(-37).100=-3700

b) |-12|.3+6.(-15).(-2)³=12.3+6.(-15).(-8)=12.3+6.15.8=6.2.3+6.3.5.2.4=2.3.6.(1+5.4)=36.21=756

(**** nha)

____Ngốc cuồng BTS____:

-75+(-49)+|-75|+49-12

=-75+(-49)+75+49-12

=[-75+(-49)]+(75+49)-12

=-124+124-12

=0-12

=-12

\(-75+\left(-49\right)+|-75|+49-12=-75-49+75+49-12\)

                                                                      \(=\left[\left(75-75\right)+\left(49-49\right)\right]-12=0+0-12=-12\)

tôi cuông bts đây

=-75+(-49)+75+49-12

=-124+75+49-12

=-49+49-12

=0-12

=-12

\(\sqrt{12}+2\sqrt{27}+3\sqrt{75}-9\sqrt{48}\)

\(=2\sqrt{3}+6\sqrt{3}+15\sqrt{3}-36\sqrt{3}\)

\(=-13\sqrt{3}\)

5 7 − 7 5 − 1 2 − − 2 7 − 1 10 = − 24 35 − 1 2 − − 27 70 = − 24 35 − 31 35 = − 11 7

a.=18 : 9 + 5 .8

=2+40

=42

b. = -(12+42)

= -54

c. =53.25+53.75+27.18+27.82

=53.(25+75)+27.(18+82)

=53.100+27.100

=100.(53+27)

=100.80

=8000

d.{75+(-75)}+(-350)

=0+(-350)

=-350

a) 18 : 3² + 5 . 2³

= 18 : 9 + 5 . 8

= 2 + 40

= 42

b) (-12) + (-42)

= -(12+42)

= - 54

c) 53.25 + 53.75 + 27.18 + 3³.82

= 53.25 + 53.75 + 27 .18 + 27.82

= 53.(25+75) + 27.(18+82)

= 53.100 + 27.100

= 100.(53 + 27)

= 100. 80

= 8000

d) 75 + (-350) + (-75)

= 75 + (-75) + (-350)

= 0 + (-350)

= -350

Chúc bạn học tốt!

a) 18 : 3² + 5 . 2³

= 18 : 9 + 5 . 8

= 2 + 40

= 42

b) ( -12) + ( -42)

= -(42 + 12)

= -54

c) 53 . 25 + 53 . 75 + 27 . 18 + 3³ . 82

= 53 . 25 + 53 . 75 + 27 . 18 + 27 . 82

= 53 . (25 + 75) + 27 . (18 + 82)

= 53 . 100 + 27 . 100

= 100 . (53 + 27)

= 100. 80

= 8 000

d) 75 + (-350) + (-75)

= 75 + (-75) + (-350)

= 0 + (-350)

= -350.

Chúc bạn học tốt!

-7/23*75/97+75/97-11/23*75/97

=75/97*(-7/23+11/23)

=75/97*4/23

=300/2231

(3/8+ -1/4+5/12):2/3

=(9/24+ -6/24+10/24):2/3

=13/24/2/3

=13/16

ai h cho minh minh h lai cho