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21-07-2016
Mathematics

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Subtract and simplify: (3x2 - 6x + 7) - (x2 - 6x + 4)

1. 2x power of 2 + 6x + 3

2. 4x power of 2 6x + 3

3. 2x power 2 + 6x + 11

4. 2x power if 2 + 3

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meerkat18 meerkat18

21-07-2016

Distribute the negative sign to the terms inside the parentheses. Such that,
3x² - 6x + 7 - x² + 6x - 4
Combining like terms,
(3x² - x²) + (-6x + 6x) + (7 - 4)
Simplifying,
2x² + 3
The answer is choice 4

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