Bonjour,
38)
A = 3x - 3
A = 3 (x - 1)
B = 4y + 6
B = 2 (3y + 3)
C = 8 + 2n
C = 2 (4 + n)
D = 7x² - 5x
D = x (7x - 5)
E = 30a + 36a²
E = 6a (5 + 6a)
F = - 2x² - 2
F = - 2 (x² + 1)
39)
a. (x + 5)² → x² + 10x + 25
b. (x - 6)² → x² - 12x + 36
c. 4 (x + 5)² → 4x² + 40x + 100
d. (x + 10) (x - 10) → x² - 100
e. (x - 11) (x + 11) → x² - 121
f. (7x - 1)² → 49x² - 14x + 1.
