№3.
(х-5)^2=64
(x-5)=64^1/2
x-5=8
x=13.
<span>{2x=3</span>
<span>(m-3)*(m-2)-(m-1)*(m+2)=(m^2-2m-3m+6)-(m^2+2m-m-2)=</span>