Answer:
Step-by-step explanation:
B and c
Answer:

To find - sum of the given two terms.

<h2>—————————————————</h2>

<h3>
Here ,</h3>
we basically added the like terms together..
like, the terms ( 3x and -4x ) will be added together.. and the terms ( 4 and 5 ) will be added together...
since there's none other term having "x²" as the coefficient.. so 2x² will be left as it is!
hope helpful~
<h3>
~ExhaustedZombie</h3>
Answer:
0.58
Step-by-step explanation:
The first approach to solving the question above is to find the product of 0.3 and 0.4 thus:

Next step is to find the sum of 0.3 and 0.4 thus:

The final step is to find the difference between the two results. Thus:

Therefore, the product of 0.3 and 0.4 subtracted from the sum of 0.3 and 0.4 is 0.58