Question

efetue as adições e subtrações
a) ( x² + 3 x - 1) + ( - 2 x +3) =
b) ( ab² + ab 4) + ( 2 ab - ab - 5) =
c) ( - x³ - 3 x² + x) - 3 ( x³ + 2x²) =
d) ( a³ + 2a² - 5) - ( a³ - a² - 5)

Answer 1

$a)( x^2 + 3 x - 1) + ( - 2 x +3)\\ x^2+3x-1-2x+3\\x^2-x+2$

$b)( ab^2 + ab 4) + ( 2 ab - ab - 5) \\ ab^2+4ab+2ab-ab-5\\ab^2+5ab-5$


$c) ( - x^3 - 3 x^2 + x) - 3 ( x^3 + 2x^2) \\ -x^3-3x^2+x-3x^3-2x^2\\-4x^3-5x^2+x$


$d) ( a^3 + 2a^2 - 5) - ( a^3 - a^2 - 5)\\ \not}a^3+2a^2-\not}5-\not}a^3+a^2+\not}5\\3a^2$