Question

5X²-X-1=0 na formula de baskara por favor !!!​

Answer 1

a = 5

b = -1

c = -1

∆ = (-1)² -4(5)(-1)

∆ = 1+20

∆ = 21

x = -(-1)+-√21/10

x'= 1+√21/10

x"=1-√21/10