Perform the operation and write the result in standard form

Perform the operation and write the result in standard form.

(3x² + 5) - (x² - 4x + 5)

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Answer To pick from

3x² + 4x

2x² + 4x + 5

2x² - 4x

2x² + 4x

2x² + 4x - 5

Solution

Distribute negative of x^2 - 4x + 5
So, 3x^2 + 5 - x^2 + 4x -5
Now combine all the similar terms together.

=> 2x^2 + 4x ( 5 and -5 is canceled out because same thing with opposite sign)

So choice D is correct.