∵(x²+px+q)(x²-3x+2)
=x^4-3x³+2x²+px³-3px²+2px+qx²-3qx+2q
=x^4+(p-3)x³+(2-3p+q)x²+(2p-3q)x+2q
∵不含x³项和x²项
∴p-3=0
2-3p+q=0
∴p=3
q=7
∵(x²+px+q)(x²-3x+2)
=x^4-3x³+2x²+px³-3px²+2px+qx²-3qx+2q
=x^4+(p-3)x³+(2-3p+q)x²+(2p-3q)x+2q
∵不含x³项和x²项
∴p-3=0
2-3p+q=0
∴p=3
q=7