Respuesta :

Answer:

55x^4+25x³+35x²

Step-by-step explanation:

Let's make an equation :

(4x²+8x-1 + 7x²-3x+8 ) ×5x²

(11x²+5x+7)×5x²

Now we put 5x² in front and expand :

5x²(11x²+5x+7)

55x^4+25x³+35x²

Hope this helped and have a good day

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