x²-6x+8=x²-6x+9-1=(x-3)²-1=(x-3-1)*(x-3+1)=(x-4)(x-2)
x²+8x+7=x²+8x+16-9=(x+4-3)*(x+4+3)=(x+1)*(x+7)
1) x^2-6x+8=(x^2-6x+9)-9+8=(x-3)^2-1=(x-3-1)(x-3+1)=(x-4)(x-2)
2) x^2+8x+7=(x^2+8x+16)-16+7=(x+4)^2-9=(x+4-3)(x+4+3)=(x+1)(x+7)
x²-6x+8=x²-6x+9-1=(x-3)²-1=(x-3-1)*(x-3+1)=(x-4)(x-2)
x²+8x+7=x²+8x+16-9=(x+4-3)*(x+4+3)=(x+1)*(x+7)
1) x^2-6x+8=(x^2-6x+9)-9+8=(x-3)^2-1=(x-3-1)(x-3+1)=(x-4)(x-2)
2) x^2+8x+7=(x^2+8x+16)-16+7=(x+4)^2-9=(x+4-3)(x+4+3)=(x+1)(x+7)