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July 30, 2016
Posted by **Delilah** on Monday, May 6, 2013 at 8:44pm.

3. (2x2 + 6x + 1) + (–7x2 + 2x – 3)

5x2 – 4x – 2

–5x2 + 8x – 2

5x2 – 8x + 2

–9x2 – 8x + 2

4. (3x2 – 7x – 4) – (6x2 – 6x + 1)

–3x2 – x –5

–3x2 –13x + 5

9x2 – x + 5

3x2 – 13x – 5

My answers:

3. 5x2 – 8x + 2

4. –3x2 – x –5

- Math help please check -
**Reiny**, Monday, May 6, 2013 at 10:02pm#4 is correct, but #3 is not

#3.

(2x2 + 6x + 1) + (–7x2 + 2x – 3)

= 2x^2 + 6x + 1 - 7x^2 + 2x - 3 , the brackets were not needed because a +1 was understood in front of them

= -5x^2 + 8x -2