Question

Utilizando a formula de Bhaskara: x²-8x+15=0

Answer 1

x² -8x +15 = 0
Δ= b²-4ac
Δ= (-8)² -4.1.15
Δ= 64 -60
Δ= 4

x= -b +/- √Δ / 2a
x= -(-8) +/- √4 / 2.1
x'= 8 +2 /2
x'= 10/2
x'= 5

x''= 8 -2/2
x''= 6/2
x''= 3

Bons estudos!

Answer 2

x²-8x+15=0
a=1 b=-8 c=15

Δ=b²-4.a.c
Δ=-8²-4.1.15
Δ=64-60
Δ=4

x'=-b+√Δ/2.a
x'=-(-8)+√4/2.1
x'=+8+2/2
x'=10/2
x'=5

x''=-b-√Δ/2.a
x''=-(-8)√4/2.1
x''=+8-2/2
x''=6/2
x''=3