Question

02.) Simplifique as expressões :
a)(x+y)^2 +(x-y)^2 +(x+y)•(x-y)
b)(3x+2y)^2+(3x-2y)^2 +(3x+2y)•(3x-2y)

Answer 1

a)
x ^ 2 + y^ 2 + x ^ 2 -y ^ 2 + x ^ 2- y ^ 2

3x ^2 -y ^ 2

B ) 9X^2 + 4 Y^ 2 + 9X^2 - 4 Y^ 2 + 9 X^2 - 4Y^ 2


27 X^2 - 4Y^2