Question

quanto é?$4 x^{3} + 5 x^{2} =0$

Answer 1

4x³+ 5x² = 0

x²( 4x + 5) = 0

x² = 0  ==> x1= 0 ; x2 = 0

4x3 - 5 = 0 ==> 4x3 = 5 ==> x3 = 5/4