Question

Simplifique as expressões:

a)(3a-4b)²-3.(3a-8b)=


b)(2x-y)²+(x+y).(x-y)+4xy=

Answer 1

Resposta:

a) 3a^2 + 16b^2 - 9a

b) 5x^2

Explicação passo-a-passo:

a) (3a - 4b). (3a-4b) - 9a + 24b

3a^2 - 12ab - 12ab + 16b^2 - 9a + 24b

3a^2 + 16b^2 - 9a

b) (2x - y).(2x-y) + (x+ y).(x-y) + 4xy

4x^2 - 2xy -2xy + y^2 + (x^2 - xy+ xy - y^2) + 4xy

5x^2