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Mathematics
Dante Francis
9 August, 00:30
Simplify: (3x^2 - 5xy + 2y^2) - (7x^2 - 3xy - 3^2)
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Angel Harrell
9 August, 03:28
0
-4x^2 - 2xy + 2y^2 + 9
Step-by-step explanation:
First, perform the indicated multiplications: Multiply each 7x^2, - 3xy and - 3^2 by - 1:
If this is done properly, we get: - 7x^2 + 3xy + 9
Now rewrite (3x^2 - 5xy + 2y^2) - (7x^2 - 3xy - 3^2) as
3x^2 - 5xy + 2y^2 - 7x^2 + 3xy + 9)
Combining the x^2 terms, we get:
-4x^2 - 5xy + 2y^2 + 3xy + 9.
Combining the xy terms, we get:
-4x^2 - 2xy + 2y^2 + 9
This is the final answer (sum), since none of these four terms can be combined.
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