Respuesta :

cierra2377
You would want to start by putting like terms together. 
3.2g² + 5.7g² + 5.7d - 2.7d - 4.2d
Now just simplify the terms
3.2g² + 5.7g² = 8.9g²
5.7d - 2.7d - 4.2d = 3d - 4.2d = -1.2d
Now you are left with 8.9g² - 1.2d which cant be simplified more.
I think the answer is:
Answer: 8.9g^2-1.2d
I hope this helps!

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