Question

Use the discriminant to determine the number of real solutions to x^2+7x-7=0

Answer 1

Step-by-step explanation:

In general, you can skip the multiplication sign, so 5x is equivalent to 5⋅x.

In general, you can skip parentheses, but be very careful: e^3x is e3x, and e^(3x) is e3x.

Also, be careful when you write fractions: 1/x^2 ln(x) is 1x2ln(x), and 1/(x^2 ln(x)) is 1x2ln(x).

If you skip parentheses or a multiplication sign, type at least a whitespace, i.e. write sin x (or even better sin(x)) instead of sinx.

Sometimes I see expressions like tan^2xsec^3x: this will be parsed as tan2⋅3(xsec(x)). To get tan2(x)sec3(x), use parentheses: tan^2(x)sec^3(x).

Similarly, tanxsec^3x will be parsed as tan(xsec3(x)). To get tan(x)sec3(x), use parentheses: tan(x)sec^3(x).

From the table below, you can notice that sech is not supported, but you can still enter it using the identity sech(x)=1cosh(x).

If you get an error, double-check your expression, add parentheses and multiplication signs where needed, and consult the table below.

All suggestions and improvements are welcome. Please leave them in comments.

The following table contains the supported operations and functions: