Solving multi-step problems using quadratic equations in one variable

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"QF 1"

Solve 2r² - 3r -5 = 0 using the quadratic formula

• x = 1/2, -2

• x = 5/2, -1

• x = 2, -1/2

• x = 1, -5/2

• No Solution

Solve. x² + 4x - 16 = 0

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#3 answer!

Set notation

Solve using the Quadratic Formula.

• A
• B
• C
• D

• {0.623, -0.178}

• {4, -1.75}

• No Solution

• {0.236, -4.236}

• x = {-6.37, -0.63}

• x = {-7.53, 0.53}

• x = {0.63, 6.37}

• x = {-8.48, 1.48}

What are the sum and the product of the roots $15x=3x^2-2$ ? 

• S= 1/5 and P= -2/15

• S= 5 and P= -2/3

• S= -2/15 and P= 1/5
  

• S= -2/3 and P= 5

-x² + 4x + 3 = 10

• x = -5 only

• x = a number between 0 and 1

• x = -5 and another # between 0 and 1

• Answers not shown

x²−2x-11=0

• 1±2√3

• 1±3√2