Question

A) (2x²-8x+2)+(3x²+7x-1)= b) (4x+3y+2)+(6x-2y-9) c) (5x²-4x+6)-(3x²+7x-1)

Answer 1

Resposta:

$a) \: (2 {x}^{2} - 8x + 2) + (3 {x}^{2} + 7x - 1) \\ 2 {x}^{2} - 8x + 2 + 3 {x}^{2} + 7x - 1 \\ 5 {x}^{2} - x + 1$

$b) \: (4x + 3y + 2) + (6x - 2y - 9) \\ 4x + 3y + 2 + 6x - 2y - 9 \\ 10x + y - 7$

$c) \: (5 {x}^{2} - 4x + 6) - (3 {x}^{2} + 7x - 1) \\ 5 {x}^{2} - 4x + 6 - 3 {x}^{2} - 7x + 1 \\ 2 {x}^{2} - 11x + 7$