Question

Factorizați fiecare expresie algebrică propusă:
a) 2x² - 5x=
b) x² - 4=
c) a² - 4a+4=
d) 4x² - 9=
e) y² - 36/49=
f) 25a² - 20a + 4
Urgent, dau coroana!​

Answer 1

Răspuns:

a) 2x² - 5x = x (2x - 5)

b) x² - 4 = (x - 2)(x + 2)

c) a² - 4a + 4 = (a - 2)(a - 2)

d) 4x² - 9 = (2x - 3)(2x + 3)

e) y² - 36/49 = (y - 6/7)(y + 6/7)

f) 25a² - 20a + 4 = (5a - 2)(5a - 2)

a² - b² = (a + b)(a - b)

a² ± 2ab + b² = (a ± b)² = (a ± b)(a ± b)