1) 6x²+2x+3x+1= 2x(3x+1)+(3x+1)= (3x+1)(2x+1)
2) x²-2x-15=x²-5x+3x-15= x(x-5)+3(x-5)= (x-5)(x+3)
(x-3)(x+3)/(x-5)(x+3)= (x-3)/(x-5)
1) 6x²+2x+3x+1= 2x(3x+1)+(3x+1)= (3x+1)(2x+1)
2) x²-2x-15=x²-5x+3x-15= x(x-5)+3(x-5)= (x-5)(x+3)
(x-3)(x+3)/(x-5)(x+3)= (x-3)/(x-5)