Math Lab Semester 2 Final Exam

Check the two expressions that multiply together to get the result  $36xy^6$  

•  $9x^3y^2$  

•  $4x^{-1}y^3$  

•  $4x^{-2}y^4$  

•  $9xy^3$  

When simplifying the expression  $\left(7x^3\right)\cdot\left(6x^5\right)$  , what is the best explanation for combining the exponents?

• Remove parentheses

• When multiplying expressions, add the exponents.

• When multiplying, multiply the exponents.

• Calculate the product

Given the quadratic formula $x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}$ ,
solve if  $a=1,\ b=-15,\ c=50$ .

•  $x=10$  $x=5$   

•  $x=-10$   $x=-5$  

•  $x=\pm5$  

•  $x=\frac{1}{5}$   $x=15$  

Simplify (-4r⁵)(2r⁸)

• -8r¹³
• -2r¹³
• -8r⁴⁰
• -2y⁴⁰

 $\frac{18x^{10}}{6x^3}$  

•  $3x^7$  

•  $3x^{13}$  

•  $18x^7$  

•  $2x^{13}$  

Add the following polynomials:

(x³ + 6x - 5) + (-6x² + 4x + 3)

• x³ - 6x² +10x - 8

• x³ - 6x² +10x + 2

• x³ - 6x² +10x - 2

• x³ + 4x - 2

Subtract the following polynomials:

(6x² + 10x - 9) - (4x² - 13)

• 2x² + 10x - 22

• 10x² + 10x - 22

• 2x² + 10x - 4

• 2x² + 10x + 4

2x ( -2x -3)

• -4x - 3

• x² - 3

• -4x² - 6x

• -4x - 6

(4x + 1)(5x+ 2)

• 20x² + 13x − 2

• 20x² + 11x + 2

• 20x² + 13x + 2

• 20x² − 13x + 2

• 20x² + 3x + 2

Factor
x² + 11x + 24

• (x + 6)(x + 4)
• (x + 10)(x + 2)
• (x + 8)(x + 3)
• (x + 2)(x + 12)