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+4f3g2-10fg

The answers are :

option 1,option 3 and option 4.

Step-by-step explanation:

in first option:

clearly we could see that there are no like terms hence we could not simplify the expression.

in second option:

this expression could also be written as:

in third option:

as there are no like terms hence the expression can't be simplified.

in fourth option:

as there are no like terms hence the expression can't be simplified.

Hence option 1, option 3 and option 4 are the answers.

b

step-by-step explanation:

a) 0

step-by-step explanation:

i^413 x i^0 = 0 as any number multiplied by a zero is

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