Question

simplifique as expressoes abaixo
3x²+5x-1-(x²-5x)
(5x²-1)+2.(2x²-x-3)
3.(x²-2x)-2.(6x²-3)
2.(2x²+3x-1)-2.(x²-x-2)

Answer 1

= 3x²+5x-1-(x²-5x)
= 3x² + 5x - 1 - x² + 5x
= 2x² + 10x - 1

= (5x²-1)+2.(2x²-x-3)
= 5x² - 1 + 4x² - 2x - 6
= 9x² - 2x - 7

= 3.(x²-2x)-2.(6x²-3)
= 3x² - 6x - 12x² + 6
= - 9x² - 6x + 6

= 2.(2x²+3x-1)-2.(x²-x-2)
= 4x² + 6x - 2 - 2x² + 2x + 4
= 2x² + 8x + 2

Answer 2

Resposta:

= 3x²+5x-1-(x²-5x)

= 3x² + 5x - 1 - x² + 5x

= 2x² + 10x - 1

= (5x²-1)+2.(2x²-x-3)

= 5x² - 1 + 4x² - 2x - 6

= 9x² - 2x - 7

= 3.(x²-2x)-2.(6x²-3)

= 3x² - 6x - 12x² + 6

= - 9x² - 6x + 6

= 2.(2x²+3x-1)-2.(x²-x-2)

= 4x² + 6x - 2 - 2x² + 2x + 4

= 2x² + 8x + 2