Question

Se A = X2 + 1 e B = -2x2 + x + 2 , o valor do A+B vale :

Answer 1

a + b

( x² + 1 ) + ( -2x² + x + 2 )

x² + 1 - 2x² + x + 2

- x² + 3 + x²

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a - b

( x² + 1 ) - ( -2x² + x + 2 )

x² + 1 + 2x² - x - 2

3x² - x - 1

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b - a

( -2x² + x + 2 ) - ( x² + 1 )

-2x² + x + 2 - x² - 1

-3x² + x + 1