1)(5x+2)(x-2)-(x-1)(x+1)=4x-3 2)(m-1)^2=100 3)(y+4)^2-9=0 4)(x+6)^2=1 5)(t-9)^2-4=0...

Question

1)(5x+2)(x-2)-(x-1)(x+1)=4x-3 2)(m-1)^2=100 3)(y+4)^2-9=0 4)(x+6)^2=1 5)(t-9)^2-4=0 6)(x-0.1)^2=0.09 7)(y+0.7)^2=1.44

Answer 1

1) 5х^2-10х+2х-4-х^2+1=4х-3;
4х^2-12х=1
4х^2-12х-1=0
D=12^2-4•4•(-1)=144+16=160
Ну а дальше извлекай корень и по формуле: -b+-D^-2/a