factorise the following by splitting the middle term:- a square + 3a - 70
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factorise the following by splitting the middle term:- a square + 3a - 70
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Answer:
(a-7)(a+10)
Step-by-step explanation:
a² + 3a - 70
= a²+10a-7a-70
= a(a+10)-7(a+10)
= (a-7)(a+10)