SOLUTION: can you check my answer? 7x^2+6x from 9x^2-3 9x^2-3 7x^2-6 =2x^2-3 9x^2-3 7x^2+6 =2x^--3

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: can you check my answer? 7x^2+6x from 9x^2-3 9x^2-3 7x^2-6 =2x^2-3 9x^2-3 7x^2+6 =2x^--3       Log On


   

Question 74278: can you check my answer?
7x^2+6x from 9x^2-3
9x^2-3
7x^2-6
=2x^2-3
9x^2-3
7x^2+6
=2x^--3
Found 2 solutions by Cintchr, stanbon:
Answer by Cintchr(481) About Me  (Show Source):
You can put this solution on YOUR website!
If you are subtracting, a major error can occur. WATCH YOUR SIGNS!!!
+%289x%5E2-3%29-%287x%5E2%2B6x%29+
In your problem you forgot the 'x' with the 6.
Distribute the negative
+9x%5E2+-+3+-+7x%5E2+-+6x+
+2x%5E2+-+6x+-+3+

Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
can you check my answer?
7x^2+6x from 9x^2-3
9x^2-3
7x^2-6
----------------
=2x^2+3
You subtracted 7 from 9 and got 2 correctly.
You should subtract -6 from -3 and get +3
The Rule is : "change the sign of the -6 to +6 and then add" to get +3
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Cheers,
Stan H.