Question

reduza os termos semelhantes
a-3x4+2x2-4x4+5x-7x2

Answer 1

-3x^4+2x²-4x^4+5x-7x²
-7x^4 -5x²+5x

Espero que tenha entendido!

Answer 2

Resposta:

$a-3x^4+2x^2-4x^4+5x-7x^2\\\\-3x^4-4x^4+2x^2-7x^2+5x+a\\\\-3x^4-4x^4-5x^2+5x+a\\\\-7x^4-5x^2+5x+a$