Question

ex 2, e decompunere in factori, va rog ajutor dau coroana si puncte

Answer 1

a)      5 x + 10 = 5 ( x + 2) 

b)      16 x² - 9 = (4 x  - 3)²

c)      x² - 10 x + 25 = ( x - 5 )²

d)( 3 x + 1) ( x - 2) - ( 3 x + 1) ( x + 2) = ( 3 x + 1) ( x - 2 - x - 2) = ( 3 x + 1) ( - 4)

e)  ( x - y)² - 16 x² + 8 x - 1 = ( x - y)² - ( 4 x - 1)²

f)  ( x + 3)² - ( x - 5)² =

=   x² + 6 x + 9 - ( x² - 10 x + 25 )  =

= x² + 6 x + 9 - x² + 10 x - 25 =

= 16 x - 16 =

= 16 ( x - 1)