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

Norfeldt asked Mar 7, 2022

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11 votes

Norfeldt asked Mar 7, 2022

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11 votes

Answer:

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

Jmsb answered Mar 13, 2022

by Jmsb

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