-(-а-3в)^2+30ав+(4в-3а)^2= ; а=-2;в=3
=-(а^2+6ав+9в^2)+30ав+16в^2--24ав+9а^2=-а^2--6ав-9в^2+30ав+16в^2-24ав+9а^2=
=8а^2+7в^2=8*(-2)^2+7*3^2=8*4+7*9=
=32+63=95
-(-а-3в)^2+30ав+(4в-3а)^2= ; а=-2;в=3
=-(а^2+6ав+9в^2)+30ав+16в^2--24ав+9а^2=-а^2--6ав-9в^2+30ав+16в^2-24ав+9а^2=
=8а^2+7в^2=8*(-2)^2+7*3^2=8*4+7*9=
=32+63=95