SOLUTION: i need help with appropriate susbtitution please.the question says solve by making the appropriate substitution ex. x to the 4 power -9x squared-112+0
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Question 22998: i need help with appropriate susbtitution please.the question says solve by making the appropriate substitution ex. x to the 4 power -9x squared-112+0 Answer by rapaljer(4671) (Show Source):
You need to factor this by finding two numbers whose product is 112 and whose difference is 9. If you can't think of the combination, start at the beginning with 1:
1*112
2* 56
3 does not go into 112
4* 28
7* 16
That's it! There is the difference of 9!
or or
There are no real numbers that you can square to get a negative number, so has no real solutions. If you wanted complex solutions also, then the solutions of the last part would be
