What is the missing coefficient in the above expression? (3x2-4x+7)(-2x2+5x-9) = -6x4+23x3+______x2+71x-63
Think of this as:
Then multiply the 3x2 by all the terms inside the brackets; do the same for the -4x and the +7; then collect like terms together.
I dont think that is possible all the numbers I put in = to at least somewhere around 4000 while the answer has to at least be 1,078