2x2+xy-3y2+x+4y-1因式分解

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2x2+xy-3y2+x+4y-1因式分解

2x2+xy-3y2+x+4y-1因式分解
2x2+xy-3y2+x+4y-1因式分解

2x2+xy-3y2+x+4y-1因式分解
2x²+xy-3y²+x+4y-1
=2× x × x +x ×y-3×y×y+x+4×y-1
=x ×2x+x×y-y×3y+x ×1+y×4-1
=x ×(2x+y+1)-y×(3y+4)-1