Bonjour,
(2x+5)(x-3) = 0
2x + 5 = 0 ou x - 3 = 0
x = -5/2 ou x = 3
x² = 144/81
[tex]x= \sqrt{\frac{144}{81}}= \frac{ \sqrt{144} }{ \sqrt{81} }= \frac{12}{9}= \frac{4}{3}\\\\ou\\\\
x= -\sqrt{\frac{144}{81}}=- \frac{ \sqrt{144} }{ \sqrt{81} }= -\frac{12}{9}=- \frac{4}{3} [/tex]