<span>(√11-1)²=11-2√11+1=12-2√11</span>
равняетя a в степени -3 или 1:а^3
1. a) ...=b(2a-3)-2a(b-2)/2ab=2ab-3b-2ab+4a=-3b+4a
б) ...=(a+3)×3(a+3)×96a^4/8a(a+3)=3(a+3)×12a^3=3a+9×12a^3
в) ...=(x-y)(x+y)/2x(x+y)=x-y/2x
4*(2-x)+13x = -10
8-4x+13x = -10
9x = -10-8 = -18
x = -18/9
x = -2