1)(m+n)²=m²+2mn+n².
2)(2x-y)²=4x²-4xy+y².
3)(7a+1)²=49a²+14a+1.
4)49x²-25y²=(7x-5y)(7x+5y).
5)a²-1=(a-1)(a+1).
6)8x³-27y³=(2x-3y)(4x²+6xy+9y²).
7)4m²-9n²=(2m-3n)(2m+3n).
8)(5x+2y)²=25x²+20xy+4y².
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1)(m+n)²=m²+2mn+n².
2)(2x-y)²=4x²-4xy+y².
3)(7a+1)²=49a²+14a+1.
4)49x²-25y²=(7x-5y)(7x+5y).
5)a²-1=(a-1)(a+1).
6)8x³-27y³=(2x-3y)(4x²+6xy+9y²).
7)4m²-9n²=(2m-3n)(2m+3n).
8)(5x+2y)²=25x²+20xy+4y².