a²+3a+1=0,求3a³+(a²+5)(a²-1)-a(5a+6)的值已知a²+3a+1=0,求3a³+(a²+5)(a²-1)-a(5a+6)的值
来源:学生作业帮助网 编辑:作业帮 时间:2024/11/17 21:48:49
xՒMn0T%2q&Q*MPEph%N(6bIĢ8,eB߲aH|~W̠|FUy]
HR}|?ow~úZR|̣h=gT CCTCq4}ӦNvƌN 2Ro'ֆE\i8
vvu`(P.b"ZY\Eaώ3ɇԺ_t9&^Џ
a²+3a+1=0,求3a³+(a²+5)(a²-1)-a(5a+6)的值已知a²+3a+1=0,求3a³+(a²+5)(a²-1)-a(5a+6)的值
a²+3a+1=0,求3a³+(a²+5)(a²-1)-a(5a+6)的值
已知a²+3a+1=0,求3a³+(a²+5)(a²-1)-a(5a+6)的值
a²+3a+1=0,求3a³+(a²+5)(a²-1)-a(5a+6)的值已知a²+3a+1=0,求3a³+(a²+5)(a²-1)-a(5a+6)的值
a²+3a+1=0
a²+3a=-1,
a²+1=-3a,
a²+5=4-3a,
a²-1=-3a-2,
a²-4=-3a-5,
3a³+(a²+5)(a²-1)-a(5a+6)
=3a³+(4-3a)(-3a-2)-5a²-6a
=3a³+(-12a-8+9a²+6a)-5a²-6a
=3a³+4a²-12a-8
=3a³-12a+4a²-8
=3a(a²-4)+4a²-8
=3a(-3a-5)+4a²-8
=-9a²-15a+4a²-8
=-5a²-15a-8
=-5(a²+3a)-8
=-5(-1)-8
=-3
3a³+(a²+5)(a²-1)-a(5a+6)
=3a³+a^4+4a²-5-5a²-6a
=a^4+3a³-a²-6a-5
=a²(a²+3a+1)-2a²-6a-5
=-2a²-6a-5
=-2(a²+3a+1)-3
=-3