Question

please solve them fast​

Answer 1

Answer:

$\pink{1).25yz - 8yz - 6yz}$

$\pink{= 11yz}$

$2.{9 {x}^{2} - 6 + 4x + 11 - 6 {x}^{2} - 2x + 3 {x}^{2} - 2}$

$=9 {x}^{2} - 6 {x}^{2} + 3 {x}^{2} + 4x - 2x + 11 - 2$

$6 {x}^{2} - 2x + 9$

$3.)5 {x}^{2} + 10 + 6x + 4 + 5x + 3 {x}^{2} + 8$

$= 5 {x}^{2} + 3 {x}^{2} + 10 +4 + 8 + 6x + 5x$

$=8 {x}^{2} + 22 + 11x$