Question

daca A=3x+2 si B=2x-3 sa se calculeze A·B+B.

Answer 1

$a = 3x + 2$

$b = 2x - 3$

$a \times b + b = (3x + 2)(2x - 3) + 2x - 3$

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

$= 6 {x}^{2} - 3x - 9$

$= 3(2 {x}^{2} - x - 3)$

Answer 2

A = 3 x + 2  si  B = 2 x - 3 

A × B + B = ( 3 x + 2 ) ( 2 x - 3 ) + 2 x - 3 =

= 6 x² + 4 x - 9 x - 6 + 2 x - 3 = 

= 6 x² - 3 x - 9 =

= 3 ( 2 x² - x - 3 )