Ta có 34.(66 - 5) - 66.(34 + 5)

= 34.66 - 34.5 - 66.34 - 66.5

= -5.(34 + 66)

= - 5.100 = - 500

34(66-5)-66(34+5)=34.66-34.5-34.66-66.5=(34.66-34.66)-5(34+66)=-500

=34x66-34x5 -66x34-66x5

=-34x5-66x5

=5x(-34-66)=5x(-100)=-500

34.(66-5)-66.(34+5)=(34-34).(66-66).(5+5)=0.0.10=0

       \(34.\left(66-5\right)-66.\left(34+5\right)\)

\(=34.66-34.5-66.34-66.5\)

\(=\left(34.66-66.34\right)-\left(34.5+66.5\right)\)

\(=0-\left(34+66\right).5\)

\(=0-100.5\)

\(=0-500\)

\(=-500\)

\(34.\left(66-5\right)\)\(-66.\left(34+5\right)\)

\(=34.66-34.5\)\(-66.34-66.5\)

\(=-34.5-66.5\)

\(=5.\left(-34-66\right)\)

\(=5.\left(-100\right)\)

\(=-500\)

k mk nhe

34.66 - 34.4 - 66.34 - 66.4

= ( 34.66 - 66.34) - ( 34.4 +66.4)

= 0 - 4.(34+66)

= -4.100 

= -400

\(34.\left(66-4\right)-66.\left(34+4\right)\\ =34.66-34.4-66.34-66.4\\ =\left(34-34-4\right).66-34.4\\ =-4.66-34.4\\ =4.\left(-66\right)-34.4\\ =4.\left(-66-34\right)\\ =4.\left(-100\right)\\=-400\\ -264.\left(-400\right).264.40\\ =264.400.264.40\\ =264.4.100.264.4.10\\ =264.4.264.4.\left(100.10\right)\\ =\left(264.4\right)^2.1000\\ =1115136.1000=1115136000\)

ngu

`34+2(x-5)^2=66`

`=>2(x-5)^2=66-34`

`=>2(x-5)^2=32`

`=>(x-5)^2=32:2`

`=>(x-5)^2=16=(4)^2=(-4)^2`

`=>` $\left[ \begin{array}{l}x-5=4\\x-5=-4\end{array} \right.$

`=>` $\left[ \begin{array}{l}x=9\\x=1\end{array} \right.$

Vậy x=9 hoặc x=1

Ta có: \(34+2\left(x-5\right)^2=66\)

\(\Leftrightarrow2\left(x-5\right)^2=32\)

\(\Leftrightarrow\left(x-5\right)^2=16\)

\(\Leftrightarrow\left[{}\begin{matrix}x-5=4\\x-5=-4\end{matrix}\right.\Leftrightarrow\left[{}\begin{matrix}x=9\\x=1\end{matrix}\right.\)

Vậy: \(x\in\left\{1;9\right\}\)

200

mk kick bn òi đó

\(66+34+34+66\)

\(=\left(66+34\right)+\left(34+66\right)\)

\(=100+100\)

\(=100.2\)

\(=200\)

= 200 nhé