help pls!!
Write the given third order linear equation as an equivalent system of first order equations with initial values. 2ty"-4(2t22) y' ( +2t) y 2cos(t) with y(3)=-1, y'(3)=0, y"(3)=-1 Use z,-y, z2 = y,, and 23 = y" EY+ with initial values If you don't get this in 4 tries, you can get a hint.