(2x - 3) (3x + 4) = 6x² + 8x - 9x - 12 = <u>6x² - x - 12 </u>
You multiply -9 and -6 to solve for e.
e/-9 = -6
e = -9*-6
e = 54
Hope this helps :)
2) would be equal to 19! / 2^9 * 9!
I just wrote out all the possible choices and of the 36 choices, 27 of them had a product that was even. I don't remember the shortcut to this, but I just wrote out 1*1, 1*2, 1*3, etc.
