Question

X2 -2x - 2 igual a 0

Answer 1

∆=(-2)² -4.1.(-2)=4+8=12=> √∆=√12=2√3

x = -b±√∆/2a

x = 2±2√3/2.1

x' =2+2√3/2 = 1+√3 ✓

x" =2-2√3/2 = 1-√3 ✓

Answer 2

Olá ^^

x² - 2x - 2 = 0

A= 1

B= - 2

C= - 2

∆= b² - 4ac

∆= ( - 2)² - 4 • 1 • ( - 2)

∆= 4 + 8

∆= 12

x= - b ± √∆ / 2a

x= - ( - 2) ± √12 / 2 • 1

x'= 2 + √12/2

x''= 2 - √12/2