Find the square (3x+y)​

Knobi asked Mar 16, 2022

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41 votes

Find the square (3x+y)

Knobi asked Mar 16, 2022

by Knobi

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7 votes

Answer:

9x² + 6xy + y²

Explanation:

(a + b)² = a² + 2ab + b²

a = 3x

b = y

(3x +y)² = (3x)² + 2*3x*y + y²

= 9x² + 6xy + y²

(3x)² = 3²*x² = 3*3*x² = 9x²

Superb answered Mar 22, 2022

2.7k points

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