Resolva: ( x + 2 ) . ( x^2 + 3x - 9 )

Resolva:

( x + 2 ) . ( x^2 + 3x - 9 )

x³ + 5x² - 3x - 18

( x + 2 ) . ( x² + 3x - 9 )

x( x² + 3x - 9) => x³ + 3x² - 9x

2( x² + 3x - 9) => 3x² + 6x - 18

x³ + 3x² - 9x +  3x² + 6x - 18 => x³ + 5x² - 3x - 18

x³+5x²-3x-18

(x+2)(x²+3x-9) =

x³+3x²-9x+2x²+6x-18

x³+3x²+2x²-9x+6x-18

+5x²-3x-18

❤️❤️ Prontinho ❤️❤️

18/01/23

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