Question

Resolvam por favor
√x+3=x+1

Answer 1

√x + 3 = x + 1
(√x)² + 3² = x² + 1²
x + 9 = x² + 1

x² - x + 1 - 9 = 0
x² - x - 8 = 0

Δ = (-1)² - 4.1.(-8)

Δ = 1 + 32 = 33

x = -(-1) +- √33/2.1

x' = 1 + √33/2 = 1 + 5,74/2 = 6,74/2 = 3,37

x" = 1 - √33/2 = 1 - 5,74/2 = - 2,37