masilauda masilauda

30-06-2021
Mathematics

contestada

find the square (3x+y)

Respuesta :

devishri1977 devishri1977

30-06-2021

Answer:

9x² + 6xy + y²

Step-by-step 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

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