Factorise :- 15ab + 15 + 9b + 25a 

Please Give Explanation.

Dear Student,

15ab+15+9b+25a=15ab+9b+15+25a                                    =3b5a+3+53+5a                                    =3+5a3b+515ab+15+9b+25a=3+5a3b+5

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