Question

ME AJUDA NESSA RESOLVA ( 2 X - 5 ) ( X - 2 ) = - ( X + 2 ) ( 1 - X ) - 4 DELTA

Answer 1

(2x - 5). (x - 2) = - ( x + 2) ( 1 - x) - 4

2x² - 4x - 5x + 10 = - ( x - x² + 2 - 2x) - 4
2x² - 9x + 10 = - x + x² - 2 + 2x - 4
2x² - 9x + 10 = x² - x + 2x - 2 - 4
2x² - 9x + 10 = x² - x - 6
2x² - x² - 9x + x + 10 + 6 = 0

x² - 8x + 16 = 0
a = 1, b = - 8; c = 16 

Δ = b² - 4ac
Δ = (-8)² - 4.1.16
Δ = 64 - 64
Δ = 0

x = - b +/- √Δ = - (- 8) +/- √0
         2a                  2.1

x = 8
     2

x = 4