Question

a) (5x²-9x+1)+(2x²+7x-2)=
b) (3x²+4x-8)+(-2x²+2x-1)=​

Answer 1

Resposta:

a ) 7x²-2x-1

$\sf{ (5x²-9x+1)+(2x²+7x-2)}$

$\sf{5 {x}^{2} - 9x + 1 + (2 {x}^{2} + 7x - 2) }$

$\sf{5 {x}^{2} - 9x + 1 + {2x}^{2} + 7x - 2}$

$\sf{7 {x}^{2} - 9x + 1 + 7x - 2}$

$\sf{7x {}^{2} - 2x + 1 - 2 }$

$\rightarrow \boxed{ \boxed{\sf{7 {x}^{2} - 2x - 1 }}} \checkmark$

b) x²+6x-9

$\sf{(3x²+4x-8)+(-2x²+2x-1)}$

$\sf{3 {x}^{2} + 4x - 8 + ( - 2 {x}^{2} + 2x - 1}$

$\sf{3 {x}^{2} + 4x - 8 - {2x}^{2} + 2x - 1 }$

$\sf{ {x}^{2} + 4x - 8 + 2x - 1}$

$\sf{ {x}^{2} + 6x - 8 - 1 }$

$\rightarrow \boxed{ \boxed{\sf{ {x}^{2} + 6x - 9}}} \checkmark$

Explicação passo-a-passo:

(espero ter colaborado)