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Sunafegon · Answer 1 · 2022-08-25T12:56:04+0000

Answer:

-2a^2-2a+11

Explanation:

To solve the question, use the given values of the variables and substitute them into the given expression.

We know that
C = 2a^2-5 and
D = 3-a . With these values, we need to find
2D-C . So, substitute
2a^2-5 for the
and
3-a for the
in that expression. Then, solve:

$2D-C\\\\= 2(3-a)-(2a^2-5)\\= 6-2a-2a^2+5\\= -2a^2-2a+11$

Thus,
2D-C equals
-2a^2-2a+11 .

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