3x в квадрате -0,6x+0,03-3(x-0,1)(x+0,1)

3х²-06х+0.03-3*(х-0.1)*(х+0.1)=03х²-0.6х+0.03-3*(х²-0.01)=03х²-0.6х+0.03-3х²+0.03=0-0.6х+0.06=0-0.6х=-0.06х=(-0.06)/(-0.6)х=0.1