amazingdoggy300 amazingdoggy300

17-03-2017
Mathematics

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*the problem is in the pic that is uploaded

the problem is in the pic that is uploaded class=

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apologiabiology apologiabiology

17-03-2017

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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