Question

efetue e simplifique as expressões algébricas
A= (x+1)²-x(x+2)

B= 10-(X+3)²

C= 8X-(2x+1)²

D= (3x+2)²-(3x+1)²​

Answer 1

Resposta:

A=

${x}^{2} + 2x + 1 - {x}^{2} - 2x$

$= 1$

B=

$10 - ( {x}^{2} + 6x + 9)$

$= 10 - {x}^{2} - 6x - 9$

$= - {x}^{2} - 6x + 1$

C=

$8x - (4 {x}^{2} + 4x + 1)$

$= 8x - 4 {x}^{2} - 4x - 1$

$= - 4 {x}^{2} + 4x - 1$

D=

$9 {x}^{2} + 12x + 4 - (9 {x}^{2} + 6x + 1)$

$= 9 {x}^{2} + 12x + 4 - 9 {x}^{2} - 6x - 1$

$= 6x + 3$