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Mathematics 15 Online
OpenStudy (anonymous):

sqrt{7x+46} x+4

OpenStudy (anonymous):

\[\sqrt{7x+46}=x+4\]

OpenStudy (anonymous):

7x+46=(x+4)^2=x^2+8x+16 7x+46=x^2+8x+16 x^2+x-30=0 Solve it

OpenStudy (anonymous):

-6 or 5????

OpenStudy (anonymous):

Yes

OpenStudy (anonymous):

not sure which one

OpenStudy (anonymous):

Both

OpenStudy (anonymous):

A quadratic equation has two solutions

OpenStudy (anonymous):

so -6,5

OpenStudy (anonymous):

Thanks so much

OpenStudy (anonymous):

No problem

OpenStudy (anonymous):

parenthesis???

OpenStudy (anonymous):

What?

OpenStudy (anonymous):

is it (-6,5) or just -6,5

OpenStudy (anonymous):

There's no difference

OpenStudy (anonymous):

x=-6,5

OpenStudy (anonymous):

\[k^{4} \over k^{19?}\]

OpenStudy (anonymous):

divide and simplify

OpenStudy (anonymous):

\[(a^m)/(a^n)=a ^{m-n}\]

OpenStudy (anonymous):

\[k^{4-19}\]

OpenStudy (anonymous):

is that right?

OpenStudy (anonymous):

What is 4-19?

OpenStudy (anonymous):

Simplify it

OpenStudy (anonymous):

15

OpenStudy (anonymous):

so the correct answer is \[k^{15}\]

OpenStudy (anonymous):

or is it 3.63

OpenStudy (anonymous):

4-19=-15

OpenStudy (anonymous):

yes sorry i forgot to put the negative sign

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