Question

dada a função f(x)=5x+2x-3, determine o valor de x para , f (x)=0​

Answer 1

5x² +2x -3 = 0

∆= 2² -4.5.(-3)=4 +60=64 => √∆=8

x'= -b+√∆/2a= -2+8/10= 6/10 = 5/3 ✓

x"= -b-√∆/2a= -2-8/10= -10/10 = -1 ✓