运用乘法公式计算计：（m-2n+3p）(m+2n+3p)

过程-v-

---

（m-2n+3p）（m+2n+3p）
=（m+3p-2n）（m+3p+2n）
=（m+3p）的平方-4n的平方
=m的平方亮差+6mp+9p的平方-4n的平巧扒方敬宽皮

---

（m-2n+3p）(m+2n+3p)
=m(m+2n+3p)-2n(m+2n+3p)+3p(m+2n+3p)
=m²+2mn+3mp-2nm-4n²-6np+3pm+6pn+9p²键磨帆游档
=m²-4n²+9p²+6mp
=(m+3p)²-4n²稿雹

---

e .....

---