Question

Resolva algebricamente as equações.

y² - 6y - 27 = 0

Answer 1

Y²-6y-27=0
A=1 B=-6 C=-27

Δ=B²- 4×A×C
Δ= (-6)² - 4×1×(-27)
Δ= 36 + 108
Δ= 144

X= -b+-√Δ / 2×a
X= 6+-14 / 1
X'= 20 e X''=-8