A) b/a+b * a^2-b^2/b^2 = b * (a-b)(a+b)/(a+b)*b^2 = a-b/b
б) 2x-2y/y : x^2-y^2/y^2 = 2(x-y)*y^2/y*(x-y)(x+y) = 2y/x+y
в) (-2a^2/b)^3 = -8a^6 / b^3
г) 3ab * a^2/b = 3ab*a^2/b
x*dx 1/2d(x^2) 1 d(x^2) 1
5x*(2x-3)-2,5x*(4x-2x)=10x^2-15x-10x^2+5x^2=5x^2-15x=5x*(x-3) при x=-0,01
5*(-0,01)*(-0,01-3)=-0,05*(-3,01)=0,1505
=-п/2-3/2•п/3+3•(-п/6)=-п/2-п/2-п/2=-3п/2