(4n+7)(2n+3)=? (7z-2)(z-3)=? (6z-y)(2z-y)=? (10x+3z)(10x-5z)=?
1] 8n^2+26n+21
2}7z^2-23z+6
3}12z^2-8zy +y^2
4}100x^2-20zx-15z^2
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Answers & Comments
1] 8n^2+26n+21
2}7z^2-23z+6
3}12z^2-8zy +y^2
4}100x^2-20zx-15z^2