Question

Rezolvati ecuatia: x(x - 5) + 8=(x + 4)(x - 4) - 3(x - 4).

Answer 1

x^2 - 5x +8 = x^ - 4^2 - 3x +12
x^2 -5x +8 -x^2 +16 +3x -12 = 0 se recuce x^2
-2x -12 = 0 
-2x = 12 
x = - 6

Answer 2

=x²-5x+8=x²-16 -3x+12(x² cu x² se duc)
=-5x+3x=-16+12-8
=-2x=-4-8
=-2x=-12=> x= -12÷ (-2)= 6