Question

X2-2x-2x-4 mim ajude por favor ​

Answer 1

Resposta:

x²-2x=2x-4

x-2x-2x=-4

x²-4x=-4

x²-4x+4=0

Δ = b² -4ac

Δ = (-4)² -4 *1 * 4

Δ= 16 -16

Δ = 0

x' = (-b + √∆)/ 2a

(-(-4) + 0)/2 * 1

(4 + 0)/2

4/2= 2

x'' = (-b - √∆)/ 2a

(-(-4) - 0)/2 * 1

(4 - 0)/2

4/2= 2

S={2,2}.