factorise the following expression a^2 - 4
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Answered by
1
Answer:
a^-2..................................................... mark me as brainlist
Answered by
2
Answer:
a=+2 or -2
Step-by-step explanation:
a^2-4=(a+2)(a-2)
now to factorise we should make it equal to 0
if a+2=0
a=-2
if a-2=0
a=2
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