Question

alguém pode me ajudar???​

Answer 1

$a = {3x}^{2} - 5x + 2 \\b = {3x}^{2} + 5x - 2$

A) A + B

${3x}^{2} - 5x + 2 + {3x}^{2} + 5x - 2 = {6x}^{2}$

B) A - B

$( {3x}^{2} - 5x + 2) - ( {3x}^{2} + 5x - 2) = \\ {3x}^{2} - 5x + 2 - {3x}^{2} - 5x + 2 = - 10x + 4$

C) B + A

${3x}^{2} + 5x - 2 + {3x}^{2} - 5x + 2 = {6x}^{2}$

D)B - A

$( {3x}^{2} + 5x - 2) - ( {3x}^{2} - 5x + 2) = \\ {3x}^{2} + 5x - 2 - {3x}^{2} + 5x - 2 = 10x - 4$