1.
a) (1 -0.8²) /0.6 =(1 -0.8)(1 + 0.8) /0.6 =(0.2 *1.8) /0.6 = 0.2 *3 =0.6
b) (1.4-0.5)(1.4+0.5) /0.3² = (0.9 *1.9) /0.09 =10 *1.9 =19
в) 6.4 /(4-0.8)(4+0.8) = 6.4 / 3.2*4.8 =2 /4.8 =2 : 48/10 = 2 * 10/48 =20/48 =5/12
г) 0.3² /(0.4 -0.2)(0.4+0.2) = 0.3² /0.2*0.6 =0.09 /0.12 = 0.75
д) (1.7 -1.3)(1.7 +1.3) / (2.8 - 2.2)(2.8 +2.2)=0.4*3 /0.6*5 =0.08*5=0.4
e) (1.2 -0.3)(1.2 +0.3) /(0.8 - 0.7)(0.8 +0.7) =0.9*1.5 /0.1*1.5 =0.9/0.1 =9