ibrah56 ibrah56
  • 03-03-2022
  • Mathematics
contestada

3 times the sum of r and s squared minus 2 times the sum of r and d square

Respuesta :

ashish4112119
ashish4112119 ashish4112119
  • 03-03-2022

Answer:

r^2 + 6rs  - 4rd - 2d^2 + 3s^2

Step-by-step explanation:

3(r+s)^2 - 2(r+d)^2

PEMDAS

parenthesis, exponents, multiplication, division, addition, subtraction

in that order

3( r^2 + 2rs + s^2 ) - 2(r^2+ 2rd + d^2)

3r^2 + 6rs + 3s^2 - 2r^2 - 4rd - 2d^2

r^2 + 6rs  - 4rd - 2d^2 + 3s^2

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