Question

( X - 2 )² - X = 1 com fórmula de baskara

Answer 1

(x - 2)² - x = 1

x² - 4x + 4 = 1            x² -4x- x+ 4 - 1 =0            x²-5x+3=0  eq 2° grau

a= 1     b = -5   c = 3            Δ=b²-4ac    Δ= (-5)²-4.1.(3)    Δ=25 - 12   Δ=13


x= -b +- √Δ / 2a

x' = 5+√13/2    =  4,300

x'' = 5 - √13/2  =  0,695