Question

(7m+9n)2 pls solve this calculation​

Answer 1

Is it (7m+9n)² or (7m+9n)×2

If the first one

(7m+9n)²=(7m)² + 2(7m)(9n) +(9n)²

=49m²+126mn + 81n²

If second one

(7m+9n)×2=(7m×2)+(9n×2)

=14m+18n

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