.
2.a) |x-√12| =√3
|x-2√3|=√3
x-2√3=√3
x=2
b)x√27=√300-√48
3x√3=10√3-4√3
3x√3= 6√3
x=2
3.
3a-2b=8|×(-4)
4a+3b=5|×3
-12a+8b=-32
12a+9b=15
/+17b=-17
b=-1
=> 3a+2=8
3a=6
a=2
4.
[tex]lm = \frac{16}{2} \\ lm = 8 \: cm[/tex]
[tex]h = 3 \\ aria = \frac{16 \times 3}{2} \\ = \frac{48}{2} \\ = 24 \: {cm}^{2} [/tex]
[tex]ac = \sqrt{64 + 9} \\ = \sqrt{73} \\ ao = \frac{2}{3} \times ac \\ ao = \frac{2 \sqrt{73} }{3} [/tex]
