Welcome. Have fun. I recommend using full screen to avoid display issues.
A few things to keep in mind:
The format for entering in your solutions uses $+, -$ for addition and subtraction, respectively, and the ^ sign for exponents. The amount of spacing between the numbers, variables, and operations does not matter. e.g.
x^2 - 3x + 4 $\longrightarrow x^2 - 3x + 4$
3 x ^ 2 -3x+4 $\longrightarrow x^2 - 3x + 4$
-2(x - 4)^2 + 4 $\longrightarrow (x - 4)^2 + 4$
2(4 x - 3)(x + 12 ) $\longrightarrow 2(4 x - 3)(x + 12 )$
When you have to write down a number that is not an integer (that is, a fraction), round everything to the nearest tenths place. e.g. $\frac{1}{2} = 0.5, \; \frac{3}{4} = 0.8, \; \frac{22}{7} = 3.1$
When a quadratic factors into two identical factors, make sure to write the solution as such:
\[x^2 - 4x + 4 = (x - 2)^2\]
rather than
\[x^2 - 4x + 4 = (x - 2) (x - 2)\]
Even though the latter is technically correct, we want to get into the habit of writing these things with exponents in a concise way.
When factoring polynomials, the coefficient of the linear terms of the factors should always be positive. That is,
\[-x^2 + 1 = -(x + 1) (x - 1), \text{ not } -x^2 + 1 = (-x - 1)(x - 1) \text{ or } (x + 1) (-x + 1)\]
A few things to keep in mind:
In the input boxes, make sure to write your matrices where each row is written in a separate line and the row elements are separated by commas. Some examples are shown below. Remember that there are no commas at the end of each line, and you must make a new line for new rows.
The matrix
\[\begin{pmatrix} 2 & 3 \\ 1 & 4 \end{pmatrix}\]
is written
2, 3
1, 4
The matrix
\[\begin{pmatrix} -2 & 13 & 0 & -7\\ 0 & 0 & -12 & 81 \\ 13 & -4 & -9 & 43 \end{pmatrix}\]
is written
-2, 13, 0, -7
0, 0, -12, 81
13, -4, -9, 43
If the problem ever overfills to the point where the solution box is covering the exercise, then you can temporarily zoom out (press CTRL and - keys), which should give you more space.