(3m+2n)的2次方-4(m-6n)的2次方

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(3m+2n)的2次方-4(m-6n)的2次方(3m+2n)的2次方-4(m-6n)的2次方(3m+2n)的2次方-4(m-6n)的2次方(3m+2n)²-4(m-6n)²=(3m

(3m+2n)的2次方-4(m-6n)的2次方
(3m+2n)的2次方-4(m-6n)的2次方

(3m+2n)的2次方-4(m-6n)的2次方
(3m+2n)²-4(m-6n)²
=(3m+2n)²-(2m-12n)²
= (3m+2n+2m-12n)(3m+2n-2m+12n)
= (5m-10n)(m+14n)
= 5 (m-2n)(m+14n)