Question

x2+4x-60=0 me ajudem

Answer 1

x = (- b +- √b^2 - 4ac) / 2a
x = (-4 +- √16 + 240) / 2
x = (-4 +- √256) / 2
x = (-4 +- 16) / 2

x' = (-4+16)/2
x' = 6

x" = (-4-16)/2
x" = -10

Answer 2

a=1
b=4
c=-60

Δ=b²-4.a.c
Δ=4²-4.1.(-60)
Δ=16+240
Δ=256

x=-b+-√Δ/2a
x=-4+-√256/2.1
x=-4+-16/2
x=-4+16/2=12/2=6
x=-4-16/2=-20/2=-10

S={6,-10}