Question

Va rogg pentru maine imi trebuie !!!

Answer 1

[tex]1) P= l^{2};l= \sqrt{P}= \sqrt{8 x^{2}y-4 x^{2} y } = \sqrt{4 x^{2} y(2-1)} = \sqrt{ 2^{2}* x^{2} *y*1 } [/tex]$=2x \sqrt{y}$

$3) V2=V1*2 \sqrt{9} = \sqrt{5} x^{2} y*2 \sqrt{9} = \sqrt{5} x^{2} y*2*3=6 \sqrt{5} x^{2} y$

$4) (x+3)^{2} +(x-1)^{2} +(x-2)^{2} =(x^{2} +2x*3+3^{2})+(x^{2} -2x+1^{2})+$$+( x^{2} -2x*2+ 2^{2} )= x^{2} +6x+9+ x^{2} -2x+1+ x^{2} -4x+4=$

$=3 x^{2} +14$

[tex]5) AD^{2} =CD*DB; CD+DB=CB; BD= \frac{30}{100} DC; [/tex][tex]CB= \frac{30}{100}DC+DC= \frac{130}{100}DC=26hm=2600m; DC =2600: \frac{130}{100}= [/tex]
$=2600* \frac{100}{130} =$
Se simplifica 2600 si 130 prin 130$= \frac{20}{100}=$
Se simplifica 20 si 100 prin 20 $= \frac{1}{5}$