5+2√5√3+3-√60=5+3+2√15-2√15=<em><u>8</u></em>
√60=2√15
√3√2=√15
1) 95271-95269=2
2)21007*9=189063
3) 189066+189063=378129
4)378129-2=378128
S(ABCD) = AB*AB
AM = AP = 1/2*AB => MP^2 = (1/2*AB)^2 + (1/2*AB)^2
MP^2 = 1/4*AB^2 + 1/4*AB^2 = 1/2 * AB^2
MP = 1/(корен(2))*АВ
S(MNKP) = MP*MP = 1/2*AB^2 = 1/2*S(ABCD)
S(MNKP) / S(ABCD) = 1/2