Respuesta :

leena

Answer:

[tex]21x^{4}+ 56x^{3}+49x^{2}[/tex]

Step-by-step explanation:

When we multiply the two sides together, we get:

(3x²·7x²) + (8x·7x²) + (7·7x²) =

[tex]21x^{4}+ 56x^{3}+49x^{2}[/tex]

This is the polynomial in standard form.

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