Question

X² - 16=0
X²- 9=0
X²- 15=0
3X²-48=0
3x²-27=0
X² mas 3x=0

¿cual es?

Answer 1

Hola Yami!

x² - 16 = 0
x² = 0 + 16
x² = 16
x = √16
x = +- 4
-------------------------------------
x² - 9 = 0
x² = 0 + 9
x² = 9
x = √9
x = +- 3
--------------------------------
x² - 15 = 0
x² = 0 + 15
x² = 15
x = +-√15
-------------------------------
3x² - 48 = 0
3x² = 0 + 48
3x² = 48
3x²/3 = 48/3
x² = 16
x = √16
x = +- 4
------------------------------------
3x² - 27 = 0
3x² = 0 + 27
3x² = 27
3x²/3 = 27/3
x² = 9
x = √9
x = +- 3
------------------------------------
x² + 3x = 0
x (x + 3) = 0