Question

1、(1/2)x^2-(1/2)y^2+(3/2)x-(7/2)y-5

Answer 1

1、=1/2[(x+y)(x-y)+3x-7y-10]

=1/2(x+y+5)(x-y-2)

2、=2x^(n-6) [x^12-5x^9-2x^6+5x^3+1]

=2x^(n-6)[(x^6-1)²-5x³(x^6-1)]

=2x^(n-6)(x^6-1)(x^6-5x³-1)

=2x^(n-6)(x^6-5x³-1)(x+1)(x-1)(x²+x+1)(x²-x+1)