Question

9x² - 5x = x - 1 Qual o resultado com x' e x"

Answer 1

9x² - 5x = x - 1

9x²-5x-x+1=0

9x²-6x+1=0

a= 9 b=-6 c=1

Δ=b²-4ac

Δ=(-6)² - 4 *9 * 1

Δ= 36 - 36

Δ = 0 ⇒ duas raizes iquais

x= -b+-√Δ / 2a

x= -(-6) +-√0 / 2*9

x= 6+-0 / 18

x' = 6+0 / 18 = 6 /18 :6 = 1 / 3

x'' = 6-0 / 18 = 6 /18 :6 = 1 / 3

s=} x'= 1/3 e x'' = 1/3 }