-7z^7(-19z^7) = (-7 x -19) x z^(7 + 7) = 133z^14
5 - (x + 5) - (2x + 4)
5 - x - 5 - 2x - 4
-3x - 4
First you should draw yourself a square.Since you know it is a square you can find each side by dividing it by 4. 32/4 = 8. Since it is a square you know that both the length and width are 8. If you draw in the diagonal that is a right triangle. Use the Pythagorean theorem a^2 + b^2= c^2 to find the length of the diagonal.
8^2 + 8^2 = c^2
I think it is 32, bc the value of x is 20 so your problem would look like this; 2 ( (20) - 4 )
