1.4*5,6=7.84
-5,64:1,2=-4,7
-4,7+7.84=3.14
(2+Sin²b)-(3-Cos²b)= 2+Sin²b-3+Cos²b =2+1-3=0 при любом b
1) x^2 - 6.25 = 0 ; x^2 = 6.25 ; x = Sqrt(6.25) ; x = 2.5
2) 3.24 - x^2 = 0 ; x^2 = 3.24 ; x = Sqrtt(3.24) ; x = 1.8
3) 2y^2 - 2.42 = 0 ; 2y^2 = 2.42 ; y^2 = 1.21 ; y = Sqrt(1.2) ;
y = Sqrt(1.21) ; y = 1.1