#7.2 Multiplying Polynomials

Multiply:

 $\left(x+4\right)\left(x+5\right)$  

•  $x^2+9x+20$  

•  $x^2+4x$  
  

•  $x^2+20x+9$  

•  $10x^2+20$  

Multiply:

 $\left(x+1\right)\left(x-6\right)$  

•  $x^2+5x+6$  
  

•  $x^2-5x-6$  
  

•  $x^2-7x-5$  
  

•  $x^2+7x+5$  
  

Multiply:

 $\left(2x-3\right)\left(x-1\right)$  

•  $2x^2+x-4$  
  

•  $2x^2-6x-4$  
  

•  $2x^2-x+3$  
  

•  $2x^2-5x+3$  
  

Multiply:

 $\left(u+2\right)\left(u+9\right)$  

•  $u^2+18u+11$  
  

•  $u^2+29u$  
  

•  $u^2+11u+18$  
  

•  $12u^2+18$  
  

Which choice represents the area of the shaded region?

• $\left(3x-8\right)\left(x+6\right)$

• $\left(3x-8\right)+\left(x+6\right)$
  

• $2\left(3x-8\right)+2\left(x+6\right)$
  

• $\left(3x-8\right)^2+\left(x+6\right)^2$
  

Which choice represents the area of the shaded region?

(Recall that the area of triangle is  $A=\frac{1}{2}bh$  )

•  $\left(4x+10\right)\left(2x-3\right)$  
  

•  $\frac{1}{2}\left(4x+10\right)\left(2x-3\right)$  
  

•  $\left(4x+10\right)+\left(2x-3\right)$  

•  $\frac{1}{2}\left(4x+10\right)+\frac{1}{2}\left(2x-3\right)$  
  

Which choice is equivalent to $x^2+5x+6$ ? 

•  $\left(x-2\right)\left(x-3\right)$  
  

•  $\left(x+2\right)\left(x+3\right)$  
  

•  $\left(x+1\right)\left(x+6\right)$  
  

•  $\left(x-1\right)\left(x-6\right)$  
  

Find the product

• $x^3+7x^2+8x+3$

• $x^3+5x^2+x$
  

• $x^3+7x^2+11x+2$
  

• $2x^2+10x+2$
  

Multiply the binomial and the trinomial.

• x³ + 6x² + 13x + 8

• x³ + 5x² + 13x + 9

• x³ + 6x² + 8x + 9

• x³ + 5x² + 8x + 8

Multiply the binomial and trinomial.

• n³ − 5n² + 10n − 12

• n³ − 2n² + 10n − 7

• 2n³ − 5n² −2n − 12

• 2n³ − 2n² + 10n − 7