👤
Valentinaalexandra67
a fost răspuns

helpp meeeeee plzzzz E urgent !!!

Descompunerea in factorii :

1. 169x2^- 121 y^2 = ??
2. ( 2x -1 )2^- 16 = ??
3.9-(5x-6 ) 2^
4.( 4a -b)2^ - ( 2a + 3b) 2^ = ??

va rog frumos e urgent !! :(

Răspuns :

Danikrisz

Explicație pas cu pas:

1. 13^2-(11y)^2=(13+11y)(13-11y)

2. (2x-1)^2 - 4^2 = (2x-1+4)(2x-1-4) = (2x+3)(2x-5)

3. 3^2 - (5x-6)^2 = (3+5x-6)(3-5x+6) = (-3+5x)(-5x+9)

4. (4a-b)^2-(2a+3b)^2= (4a-b+2a+3b)(4a-b-2a-3b)

=(6a+2b)(2a-4b)

Alte intrebari