初二因式分解题:(5P-2q)²-(P-4q)² (P+5)(P+1)+4

问题描述:

初二因式分解题:(5P-2q)²-(P-4q)² (P+5)(P+1)+4
:(5P-2q)²-(P-4q)²
(P+5)(P+1)+4

(5p-2q)²-(p-4q)²
=(5p-2q+p-4q)(5p-2q-p+4q)
=(6p-6q)(4p+2q)
=12(p-q)(2p+q)
(p+5)(p+1)+4
=p²+6p+9
=(p+3)²