Algebraic Techniques, SMB-047 Factorise the expression `-a^2+3a+10` (2 marks) Show Answers Only `-(a+2)(a-5)\ \ text(or)\ \ (5-a)(a+2)` Show Worked Solution `-a^2+3a+10` `=-(a^2-3a-10)` `=-(a-5)(a+2)` `=(5-a)(a+2)`