Respuesta :

Answer:

The correct ans is...

3 x square + 5 x - 5

Step-by-step explanation:

U can only subtract or add if u hv the same variable..

here -2x and 7x have the same variable...

so -2x + 7x = 5x

Therefore the ans is....

3 x square + 5 x - 5

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Answer:

3x²+5x-5

Step-by-step explanation:

collect like terms.

3x²+(-2x+7x)-5

3x²+ 5x-5