Question

Bhaskara : 10x elevado a 2 + 3x -4 =0

Answer 1

∆= 3^2 -4.10.(-4)
∆= 9 + 160
∆= 169

x= -3 +- √169 / 2.10
x= -3 +- 13 /20
x'= -3 +13 /20
x'= 10/20
x'= 0,5

x"= -3 - 13 /20
x"= -16 /20
x"= -0,8