Trinomial Expressions

Question

M and N are TRINOMIAL expressions...

• M= -2a² +a + 6
• N= -3a² + 2a -5

Express N - M as a Trinomial...?

Answer 1

Trinomial just means it has three terms. The question is asking you to subtract the two trinomials, then combine like terms so that your answer is also a trinomial.

 

Subtract

N-M = -3a² + 2a -5 -(-2a² +a + 6)

 

Distribute the negative sign

-3a² + 2a -5 +2a² -a - 6

 

Use commutative property

-3a² + 2a² + 2a - a - 5 - 6

 

Combine like terms

-a² + a - 11