miarabul65 miarabul65
  • 21-02-2021
  • Mathematics
contestada

find the following square by using the identities
[tex](2xy + 5y) {?}^{2} [/tex]
​

Respuesta :

devishri1977
devishri1977 devishri1977
  • 21-02-2021

Answer:

4x²y² + 20xy² + 25y²

Step-by-step explanation:

(a + b)² =  a² + 2ab + b²

a = 2xy   ; b = 5y

(2xy +5y)² = (2xy)² + 2*(2xy) * (5y)  +(5y)²

                 = 2²x²y² + 2* 2* 5 * x*y*y + 5²*y²

                =4x²y² + 20xy² + 25y²

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