Question

y等于t方减3t加1怎么变成y等于括号t减2分之3括号方减四分之五

Answer 1

y=t^2-3t+1

=t^2-2*t*(3/2)+(3/2)^2-(3/2)^2+1

=(t-3/2)^2-9/4+1

=(t-3/2)^2-5/4.