Which of these expressions cannot be simplified by combining like terms? 6fg3+4−4f2g2+f3g−12 6fg3+2f(2fg)+4f2g−10 6fg3+5f2g2+f3g−7 6f3g3+7f2g2+4f3g3−10fg

Solution:

An expression is said to be like, if there are only constants term in it, otherwise degree of variables in two distinct terms are same.

Starting from option (1)

1. As, 4 and -12 are like terms, they are combined to get  -8.

2. As, 2 f( 2 f g) and are like terms, so they can be combined to get  .

3.

as,there are no like terms, so, we cannot simplify this expression.→→→Correct Option,This expressions Cannot be simplified by combining like terms

4. As, are like terms.They can be combined to get a unique term.

20

step-by-step explanation:

2/3

step-by-step explanation: