Simplify the following expression.
First, arrange the like terms as shown.
Now add the terms +3x2 and +5x2 together. You will get 8x2.
Now add the like terms +5x and -2x together. You will get 3x.
There is no more like terms in this expression. This expression cannot be simplified further.
The final expression is 3x +8x2 +7. You can rearrange the expression as 8x2 +3x +7 so it looks neater. Therefore, the answer is B.
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