Hello could someone help me with this equation I get so far then Im stuck
72x-2 =2
I've corrected both to what I think you mean.[math]72x^{-2}=2[/math]
Or is itHello could someone help me with this equation I get so far then Im stuck
72x-2 =2
That is the solution to the problem as I corrected it; but it is not read as "72 with negative x squared equals two", which would mean "72(-x)^2 = 2". Rather, it's "72 times x to the negative 2 power equals 2".Oh thank you. I have not written it up quite right. It is 72 with negative x squared equals two.. sorry. I know th answer is x = 6 or x=-6 but I just need help with the steps. Thanks very much
Yes, I am sure. Not everything that can be written as a quadratic equation is itself a quadratic equation. In particular, as negative exponents are not allowed in polynomials, this isn't even a polynomial equation. An equation is called quadratic when it can be written as ax^2 + bx + c = 0 using only addition, not multiplying by a power of x, or substituting 1/u for x, or anything like that. That is, it can be rearranged to that form.Prof Peterson,
Are you sure about not calling that equation a quadratic equation since it can be written as one?
Steven
Thank you for your explanation. I now understand.That is the solution to the problem as I corrected it; but it is not read as "72 with negative x squared equals two", which would mean "72(-x)^2 = 2". Rather, it's "72 times x to the negative 2 power equals 2".
So please do as I suggested. (pka's suggestion is not your problem.)
Yes, I am sure. Not everything that can be written as a quadratic equation is itself a quadratic equation. In particular, as negative exponents are not allowed in polynomials, this isn't even a polynomial equation. An equation is called quadratic when it can be written as ax^2 + bx + c = 0 using only addition, not multiplying by a power of x, or substituting 1/u for x, or anything like that. That is, it can be rearranged to that form.