factorise a²-2a-8.
Answers
Answered by
1
Answer:
(a-4)(a+2)
Step-by-step explanation:
a^2-4a+2a-8
a(a-4)+2(a-4)
(a-4)(a+2)
Answered by
1
Answer:
split last term such that it's addition or subtraction is 2 ok ......
Step-by-step explanation:
factors of last term i.e. 8 whose sum or difference is 2 is 4&2 . now 4-2 is 2 so factors are -4&+2 give the middle terms sign to bigger no.
a^2+2a-4a-8=0
=>a(a+2) -4(a+2)
=> (a+2) (a-4)
=>a=-2. or a=+4
so the factors are -2&+4
ok please follow me ☺️!!
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