(X^2+8X-6)(X^2+8X+3)-36
问题描述:
(X^2+8X-6)(X^2+8X+3)-36
答
(X^2+8X-6)(X^2+8X+3)-36
=[(X^2+8X)^2]-6(X^2+8X)+3(X^2+8X)-18-36
=(X^4+16X^3+64X^2)-3(X^2+8X)-54
=X^4+16X^3+61X^2-24X-54