Illustrative Math - Algebra 2 - Unit 3 - Lesson 16

What number should be added to the expression x^{2}-15x to result in an expression equivalent to a perfect square?

• -7.5
• 7.5
• -56.25
• 56.25

Tags

A.REI.4.a

A.REI.4.b

What are the solutions to the equation x^{2}-4x=-3?

• \frac{4\pm \sqrt{16-4*0*-3}}{2*0}
• \frac{4\pm \sqrt{16-4*1*-3}}{2*1}
• \frac{4\pm \sqrt{16-4*1*3}}{2*1}
• \frac{-4\pm \sqrt{16-4*1*3}}{2*1}

Tags

A.REI.4.a

A.REI.4.b

Which expression is equivalent to \sqrt{-23}?

• -23i
• 23i
• -i\sqrt{23}
• i\sqrt{23}

Tags

A.REI.4.a

A.REI.4.b