Question

√x² - 2x + 1 = 9 - x​

Answer 1

Resposta:

x2+2x+1−9=0x2+2x−8=0Δ=b2−4ac=4−4.1.(−8)=36x=2a−b±Δx′=2−2+6=2x′=2−2−6=−4