Question

Someone please help me with this!!! (20 points)

Answer 1

Answer:

Step-by-step explanation:

7$a^{2}$ - 2a + 6  - ( -5$a^{2}$ + 3 )

7$a^{2}$ - 2a + 6 + 5$a^{2}$ - 3

12$a^{2}$ -2a +3

Answer 2

Answer:

$\bf 5a^2+5a+3$

Step-by-step explanation:

$\sf \left(7a-2a+6\right)-\left(-5a^2+3\right)$

$\sf 7a-2a+6-\left(-5a^2+3\right)$

Combine like terms:-

$\sf 5a+6-\left(-5a^2+3\right)$

Apply Distributive property:-

$\sf 5a+6+5a^2-3$

Comnine like terms:-

$\sf 5a^2+5a+6-3$

$\sf 5a^2+5a+3$