当a+b=1/2,ab=-1/3时,求6a+5ab+6b的值

当a+b=1/2,ab=-1/3时,求6a+5ab+6b的值
当a+b=1/2,ab=-1/3时,求6a+5ab+6b的值

当a+b=1/2,ab=-1/3时,求6a+5ab+6b的值
∵a+b=1/2,ab=-1/3
∴6a+5ab+6b
=6a+6b+5ab
=6(a+b)+5ab
=6×1/2+5×(-1/3)
=3-5/3
=(9-5)/3
=4/3

6a+5ab+6b=6a+6b+5ab=6(a+b)+5ab=6*(1/2)+5*(-1/3)=3-5/3=4/3