Rút gọn biểu thức: a) ((t^4+4t^2+8)/(2t^#+2)).(t/(12t^2+1))
Giải thích
a) Ta có t4+4t2+82t3+2.t12t2+1.3t3+3t4+4t2+8=(t4+4t2+8).t.3(t3+1)2(t3+1).(12t2+1).(t4+4t2+8)=3t2(12t2+1)
b) Ta có y−12y.y2+y+1+y3y−1=y−12y.y3−1y−1+y3y−1=2y3−12y
a) Ta có t4+4t2+82t3+2.t12t2+1.3t3+3t4+4t2+8=(t4+4t2+8).t.3(t3+1)2(t3+1).(12t2+1).(t4+4t2+8)=3t2(12t2+1)
b) Ta có y−12y.y2+y+1+y3y−1=y−12y.y3−1y−1+y3y−1=2y3−12y