Space or right arrow to advance, left arrow to go back.
This also works with "b"s that are negative. If we change x² + 2x - 24 to x² - 2x - 24, the answer will be (x - 6) (x + 4) = 0. You'll notice that the digits are the same, but the +/- signs are switched. An example of a positive "c" is the equation x² + 11x + 18. See if you can solve it in the comments! ******************************************************************************* This is 9th grade level math, Algebra 1.
