ВСЁ!!! кроме 5 номера((
√0.81-√0.25=0.9-0.5=0.4
-5√16-√49=-5×4-7=-20-7= -27
(3√9)^2-7.5=9×9-7.5=81-7.5=73.5
√(5^2+24)=√49=7
x^2=0.81
x=√0.81
x=0.9
40+x^2=56
x^2=16
x=√16
x=4
(x-5)^2=16
x-5=√16
x-5= +4 и x-5= -4
x=5+4=9 и x=5-4=1
_____
√0.7 < √0.8
√1.84 < √1.89
1.6 > √1.69
-----
√(0.36×81)=0.6×9=5.4
√(8×18)=√144=12
√27/√3=√9=3
√1/7×√7/11×√11/16=√1/11×√11/16=√16=4
--------
3; √15; 4; √16.5; √19