Respuesta :

Answer:

5x²+7x-4

Step-by-step explanation:

Given: (7x²+2x-1)-(2x²-5x+3)

Distribute: 7x²+2x-1-2x²+5x-3

Rearrange: 7x²-2x²+5x+2x-3-1

Combine like terms: 5x²+7x-4

Your final answer is thus 5x²+7x-4