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\[a^2 - a - 20 = a^2 - 5a + 4a - 20\]
Now u can simplify this

Hint: -5 and +4 ;-)
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a^2-a-20=(a-5)(a+4)
I stand by what I said.
-5 + 4 = -1
-5 * 4 = -20

So no, not wrong answer. Dude.

thank you guys

@Callisto very correct I regret for my mistake We just had to factorise right ?

Yes @vishweshshrimali5

There is no '=' in the original question.

@vishweshshrimali5 I've posted the way to do it

can you factor a^2 – 5a – 20 out for me ?

@Callisto I think I have misunderstood u all
Sorry for that

It's okay. Is that clear to you now? @vishweshshrimali5

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