Question

como resolver X^2=(8-X)^2+4^2

Answer 1

x² = (8 - x)² + 4²
x² = 64 - 16x + x² + 16
16x = 64 + 16
16x = 80
x = 80/16
x = 5

Answer 2

  
 como resolver X^2=(8-X)^2+4^2
  x² = ( 8 - x)² + 4²
  x² = 64 - 16x + x² + 16
  x² + 16x - x²  = 64+16
      16x = 80
         x = 5