Question

Alguem saber √x²+2x+1= √7x+1

Answer 1

√x²+2x+1= √7x+1
 √x²+2x= √7x+1-1
   x + 2x = √7x
      (3x)² = (√7x)² 
     9x² = 7x
     9x² - 7x = 0
     x(9x - 7 ) = 0
    
        x1 = 0
  
   9x2 - 7 = 0
     9x2 = 7
        x2 = 7/9