1/3*√0.36+1/5*√900= √0.36/3+1/5*30=√36/100/3+6=√9/25/3+6=3/5/3+6=3/5*3+6=1/5+6=1+30/5=31/5=6.2
9/25*2/3+9(3/5)^2
3/25*2+9/25
6/25+9/25
3/5=0,6
A1 = - 3*1 - 3 = - 3 - 3 = - 6
a2 = - 3*2 - 3 = - 6 - 3 = - 9
d = a2 - a1 = - 9 + 6 = - 3
=5x²+6x-3-2x²+3x-4=
3x²+9x+1