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8090 [49]
3 years ago
11

Help needed.......................

Mathematics
2 answers:
VladimirAG [237]3 years ago
8 0
C is the answer ... all u has to do was subtract 5 from 12 , then -11-14 , then -13-9
zhenek [66]3 years ago
7 0

Answer: 7x^2+3y^2-4x

Choose the first option

Step-by-step explanation:

Ok, so let me show you how to do this.

First, distrubute the negative sign

12x^2-11y^2-13x-(5x^2-14y^2-9x)=

12x^2-11y^2-13x-5x^2+14y^2+9x

Now combine like terms

(12x^2-5x^2)=7x^2

(-11y^2+14y^2)=3y^2

(-13x+9x)=-4x

7x^2+3y^2-4x is the answer.

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