SOLUTION: Subtract 4x2+9x+2 from 5x2+7x−9.
I keep getting the wrong answer and I need some help. Please help me. The "2" after each x is suppose to be an exponent :(
I keep getting the wrong answer and I need some help. Please help me. The "2" after each x is suppose to be an exponent :( Found 2 solutions by ewatrrr, Edwin McCravy:Answer by ewatrrr(24785) (Show Source):
You may be getting them in the wrong order.
Think of a similar simple problem with just
numbers that would be worded the same way.
For instance, think of this simple problem
that is worded the same way:
Subtract 7 from 10.
To do that you start with 10 and then subtract
7 from it, like this:
10-7
and you get 3.
So when your problem is
Subtract 4x²+9x+2 from 5x²+7x−9.
To do that you start with 5x²+7x-9 and then subtract
4x²+9x+2 from it, like this:
(5x²+7x-9)-(4x²+9x+2)
The first parentheses is not prefixed with anything,
so to remove the parentheses simply erase them.
However the second parentheses is preceded by a -
sign. So to remove the parentheses, change the sign
of every term inside, so we have
5x²+7x-9-4x²-9x-2
Combine like terms:
The 5x² and the -4x² gives x².
The +7x and the -9x gives -2x.
The -9 and the -2 gives -11.
Answer:
x²-2x-11
Edwin
