Question

Calcule com expressões algébricas:

3x + 2y – 5y + 7x =
2t² + 5t + 4 – 3t² + t – 4 =
m . (m + 2) – 5 . (2m² - 1) =
(2x + 5) . ( 3x – 2) =
(3g – 2)²=
​

Answer 1

Resposta:

$3x + 2y - 5y + 7x =\\10x-3y$

$2t^2 + 5t + 4 - 3t^2 + t - 4 =\\-t^2+6t$

$m . (m + 2) - 5 . (2m^2 - 1)=\\m^2+2m-10m^2+5=\\-9m^2+2m+5$

$(2x + 5) . ( 3x - 2) =\\6x-4x+15x-10=\\17x-10$

$(3g-2)^2=\\3g^2+4$

Explicação passo-a-passo: