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3 years ago

*the problem is in the pic that is uploaded

Mathematics

1 answer:

Alex787 [66]3 years ago

8 0

Hmm,
ok,
complete square ok
wait wat

he went from
(x-3)²=16 to
x-3=16
?????
he square rooted the left side only
he has to do it to both sides

he should have done
(x-3)²=16
x-3=+/-4
x=3+/-4
x=7 or -1

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