Question

4x(x+6)-x elevado a 2 igual a 5x elevado a 2

Answer 1

$4x(x+6) -x^2 = 5x^2 \\4x^2+ 24x - x^2 = 5x^2\\3x^2 - 5x^2 +24x = 0\\-2x^2 + 24x= 0 \\2x(-x + 12) = 0 \\2x = 0\\x = 0/2\\x = 0\\\\-x+12 = 0\\-x = -12 (-1)\\x = 12$