Sagot :
(x+4) (x) + (83) = 2 (x+3) (x+3)
x²+4x+83 = 2 (x²+6x+9)
x²+4x+83 = 2x²+12x+18
transpose the other equation
x²-2x²+4x-12x+83-18=0
-x²-8x+65=0 is the standard form
x²+4x+83 = 2 (x²+6x+9)
x²+4x+83 = 2x²+12x+18
transpose the other equation
x²-2x²+4x-12x+83-18=0
-x²-8x+65=0 is the standard form