(a-2) ^2+a-8 因式分解
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(a-2) ^2+a-8 因式分解
(a-2) ^2+a-8=(a-2) ^2+(a-2)-6=[(a-2) +3]*[(a-2) -2]=(a+1)(a-4)
原式=a²-4a+4+a-8
=a²-3a-4
=(a+1)(a-4)
(a-2) ^2+a-8
=a^2-3a-4
=(a-4)(a+1)
(a-2) ^2+a-8 因式分解
(a-2) ^2+a-8=(a-2) ^2+(a-2)-6=[(a-2) +3]*[(a-2) -2]=(a+1)(a-4)
原式=a²-4a+4+a-8
=a²-3a-4
=(a+1)(a-4)
(a-2) ^2+a-8
=a^2-3a-4
=(a-4)(a+1)