Question

Va rog!!!!
Urgent!!!!!​

Answer 1

Răspuns:

Explicație pas cu pas:

→ aplic formula  a² + 2 a b + b² = ( a + b )²;  respectiv

formula a² - b² = ( a - b ) ( a + b )

x² + 8 x + 16 = ( x + 4 )²

9 x² + 12 x + 4 = ( 3 x + 2 )²

36 x² - 60 x + 25 = ( 6 x - 5)²

4 x² - 12 x + 9 = ( 2 x - 3 )²

4 x² - 25 = ( 2 x + 5 ) ( 2 x - 5 )

144 - 25 x² = ( 12 - 5 x ) ( 12 + 5 x )

9 x² + 12 x + 4 = ( 3 x + 2)²

4 x² + 20 x + 25 = ( 2 x + 5 )²