Question

(7x+ )²= + 126x+81

( - 2b)²=100- +

( + )²=49x²+ +121y²

(5m- )²= - 80mn+84n²

(4x+14y)²= + +

( - )²=9x²-12xy+4y²

Aiuda (:​

Answer 1

Respuesta:

:) nao saber

Explicación paso a paso:

Answer 2

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