Adding & Subtracting Polynomials

Add these polynomials:

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

•  $2x^3+5x^2-3$  

•  $7x^{5\ }-3$  

•  $2x^3\ +\ 9x^2\ -\ 7$  

•  $7x^{3\ }+\ 11$  

Tags

CCSS.HSA.APR.A.1

Which is the correct way to rewrite this subtraction problem?

 $\left(2x^{2\ }+\ 5x\ -\ 9\right)\ -\ \left(3x^2-\ 4x\ +\ 6\right)$  

•  $\left(2x^{2\ }+\ 5x\ -\ 9\right)\ +\ \left(-3x^2+\ 4x\ -\ 6\right)$  

•  $\left(2x^{2\ }+\ 5x\ -\ 9\right)\ -\ \left(-3x^2+\ 4x\ -\ 6\right)$  

•  $\left(2x^{2\ }+\ 5x\ -\ 9\right)\ +\ \left(3x^2-\ 4x\ +\ 6\right)$  

•  $\left(2x^{2\ }+\ 5x\ -\ 9\right)\ +\ \left(-3x^2-\ 4x\ +\ 6\right)$  

Tags

CCSS.HSA.APR.A.1

In the notes, we said that subtracting is the same as " ___ ___ ___."

Tags

CCSS.7.EE.A.1

Which of these are correct ways of combining like terms?

(Choose all that are true.)

• $4x\ -\ \left(-5x\right)\ =\ 9x$

• $5x^2+2x^3=\ 7x^5$

• $6x^2\ +\ 2x^2\ =\ 8x^2$

• $x\ +\ 2x^{2\ }=\ 3x^2$

• $x\ +\ \left(-3x\right)\ =\ -2x$

Tags

CCSS.7.EE.A.1

What is the perimeter of this rectangle?

• $7x+4$
  

• $10x+8$
  

• $14x+8$
  

• $10x^2+4$

Tags

CCSS.7.EE.A.1

Which of these polynomials does NOT have a degree of 5?

•  $5x^{3\ }-\ 2x^2\ +\ 8$  

•  $-2x^5+x^4-7x^{2\ }+\ 9$  

•  $4x^2y^3$  

•  $-6x^5+x$  

•  $xyz^3$  

Write this polynomial in standard form:

 $2x-6x^2+7-x^3$  

What is the leading coefficient?

• 2

• -6

• 7

• -1