Question

1 задание в и г
5 задание

Answer 1

$= (0,5a)^{2} - ( b^{3}) ^{2} =(0,5a-b^{3})(0,5a+b^{3}) \ = n^{2} +20n+ 10^{2} = (n+10)^{2} \ \ x(x^{2}-1)=0 \ x(x-1)(x+1)=0 \ x_{1} =0; x_{2} =1; x_{3}=-1$