3 years ago

What a^2-2a-3=0 by solving equations by completing the square

Mathematics

1 answer:

alisha [4.7K]3 years ago

7 0

$a^2-2a-3=0\\
a^2-2a+1-4=0\\
(a-1)^2=4\\
a-1=-2 \vee a-1=2\\
a=-1 \vee a=3$

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