Answer :

[tex]985xy +350x^2 +660y^2=\\ 350x^2+985xy+66y^2=\\ 5(70x^2+197xy+132y^2)=\\ 5(70x^2+120xy+77xy+132y^2)=\\ 5(10x(7x+12y)+11y(7x+12y))=\\ 5(10x+11y)(7x+12y) [/tex]

Other Questions