Question

x²+4x-12=0
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Answer 1

∆= (-4)² -4.1.(-12)= 16 +48= 64 => √∆=8
x = -4±8/2
x' = -4+8/2 = 2✓
x" = -4-8/2 = -6✓

Answer 2

EQUAÇÃO DO 2° GRAU!!

x² + 4x - 12 = 0

∆= b² - 4ac

∆= 4² - 4 • 1 • (-12)
∆= 16 + 48
∆= 64

x= - b ± √∆ / 2a

x= - 4 ± √64 / 2 • 1
x= - 4 ± 8 / 2

x'= - 4 + 8 / 2 = 4 / 2 = 2
x''=- 4 - 8 / 2 = - 12 / 2 = - 6

S=( 2 , - 6)