Question

efetue as multiplicações

(3x²-4x-3).(x+1)

(x²-x-1).(x-3)

(x-1).(x-2).(x-3)​

Answer 1

Efetue as multiplicações

A) (3x²-4x-3).(x+1)

= 3x^3 +3x^2 - 4x^2 - 4x - 3x - 3

= 3x^3 - x^2 - 7x - 3

B) (x²-x-1).(x-3)

= x^3 - 3x^2 - x^2 + 3x - x + 3

= x^3 - 4x^2 + 2x + 3

__________________

C) (x-1).(x-2).(x-3)​

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

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

= (x^3 - 3x^2 -3x^2 +9x + 2x - 6)

= x^3 - 6x^2 + 11x - 6

Answer 2

(3x²-4x-3).(x+1) =

3x³+3x²-4x²-4x-3x-3

3x³-x²-7x-3

(x²-x-1).(x-3) =

x³-3x²-x²+3x-x+3

x³-4x²+2x+3

(x-1).(x-2).(x-3) =

(x²-2x-x+2)(x-3)

x³-3x²-2x²+6x-x²+3x+2x-6

x³-6x²+11x-6

❤️ Prontinho ❤️