a^3-10a^2+11a+70 factorise
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Answer:
a^3-10a^2+11a+70
=
Step-by-step explanation:
a^3+2a^2-12a^2-24a+35a+70
=a^2(a+2)-12a(a+2)+35(a+2)
=(a+2)(a^2-12a+35)
=(a+2)(a^2-7a-5a+35)
=(a+2){a(a-7)-5(a-7)}
=(a+2) (a-7) (a-5)
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