Question

3x 2 + 2x - 5 and -4 + 7x 2

Answer 1

Answer:

16+2x-5adn

Step-by-step explanation:

6+2x-5adn-4+14. solution: is 16=2x-5adn

Answer 2

Answer:

$\boxed{ \bold{ \huge{ \boxed{ \sf{10 {x}^{2} + 2x - 9}}}}}$

Step-by-step explanation:

$\sf{3 {x}^{2} + 2x - 5 + ( - 4 + 7 {x}^{2} )}$

When there is a ( + ) in front of an expression in parentheses, there is no need to change the sign of each term.

That means , the expression remains the same.

⇒$\sf{3 {x}^{2} + 2x - 5 - 4 + 7 {x}^{2} }$

Collect like terms

⇒$\sf{ {10x}^{2} + 2x - 5 - 4}$

Calculate

⇒$\sf{10 {x}^{2} + 2x - 9}$

Hope I helped!

Best regards!!