Răspuns :
Răspuns:
a) = (x-3)²
b) = (x+2)²
c) = (5x-1)²
d) = (a-8)²
e) = (6xy+1)²
f) = (3a-1)²
Am aplicat formula : a²+2ab+b² = (a+b)².
si a²-2ab+b² = (a-b)².
EVERGREEN
Răspuns:
Formule:
- (a + b)² = a² + 2ab + b²
- (a - b)² = a² - 2ab + b²
a) 6x² - 6x +9 = (x - 3)²
b) x² + 4x + 4 = (x + 2)²
c) 25x²- 10x + 1 = (5x - 1)²
d) a² - 16a + 64 = (a - 8)²
e) 36x²y² + 12xy + 1 = (6xy + 1)²
f) 9a² + 6a + 1 = (3a - 1)²