liljaytoraw liljaytoraw

06-08-2021
Mathematics

contestada

2. For all real numbers x and y, (2x + 3y)² = ?

Respuesta :

devishri1977 devishri1977

06-08-2021

Answer:

Step-by-step explanation:

(a + b)² = a² + 2ab + b²

a = 2x ; b = 3y

(2x)²= 2x * 2x = 4x²

(3y)² =3y * 3y = 9y²

(2x + 3y)² = (2x)² + 2 *2x*3y + (3y)²

= 4x² + 12xy + 9y²

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