Respuesta :

gmany

Answer:

[tex]\large\boxed{C-2D==2a^2+2a-11}[/tex]

Step-by-step explanation:

[tex]C=2a^2-5,\ D=3-a\\\\C-2D=?\\\\\text{Substitute:}\\\\(2a^2-5)-2(3-a)\qquad\text{use distributive property}\\\\=2a^2-5+(-2)(3)+(-2)(-a)=2a^2-5-6+2a=2a^2+2a-11[/tex]

MrRoyal

The value of C - 2D is 2a^2 + 2a - 11

How to determine the value of the expression

The expressions are given as:

C = 2a^2 - 5 and D = 3 - a

To calculate C -2D, we have:

C - 2D = 2a^2 - 5 - 2 *(3 - a)

Open the brackets

C - 2D = 2a^2 - 5 - 6 + 2a

Evaluate the like terms

C - 2D = 2a^2 - 11 + 2a

Rewrite as:

C - 2D = 2a^2 + 2a - 11

Hence, the value of C - 2D is 2a^2 + 2a - 11

Read more about expressions at:

https://brainly.com/question/4344214

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