Question

- x^{2} +4x-2 x^{2} +3x-2x???

Answer 1

Oi Stefany

a) 

-x² + 4x - 2 = 0
x² - 4x + 2 = 0

delta
d² = 16 - 8 = 8
d = 2√2

x1 = (4 + 2√2)/2 = 2 + √2
x2 = (4 - 2√2)/2 = 2 - √2

b)

x² + 3x - 2x = 0
x² + x = 0
x*(x + 1) = 0

x1 = 0
x2 = -1

.