Question

5 ( x²- 1 ) = 4 ( x ²+ 1 )



urgente!!!!!!!!!!!​

Answer 1

Resposta:

5 ( x²- 1 ) = 4 ( x ²+ 1 )

5x²- 5 = 4x ²+ 4

5x² - 4x ²=4+5

x ²= 9

x ²=V9

x=3

(3, -3)