Question

descompuneti in factori fiecare expresie algebrica
2x^2-5x=
x^2-4=
a^2-4a+4=
4x^2-9=
y^2-36/49=
25a^2-20a+4=
va rog mult chiar am nevoie

Answer 1

2x² - 5x = x·(2x - 5)

x² - 4 = x² - 2² = (x - 2)(x + 2)

a² - 4a + 4 = (a - 2)²

4x² - 9 = (2x)² - 3² = (2x - 3)(2x + 3)

y² - 36/49 = y² - (6/7)² = (y - 6/7)(y + 6/7)

25a² - 20a + 4 = (5a - 2)²