(2x?+ 7x?+ X) + (2x?- 4x - 12)

(2׳ + 7x² + x) + (2x² - 4x - 12)

 

Answer:

2x {}^{3} + 9x {}^{2} - 3x - 12

Step-by-step explanation:

copy 2x³

add 7x²+2x² that is equal to 9x²

x-4x= -3x, since we have a imaginary 1 coefficient in x

lastly, copy that constant -12


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