Lesson 17

Find the solution or solutions to each equation.

1. \(x^2+0.5x-14=0\)
2. \(x^2+12x+36=0\)
3. \(x^2-3x+8=0\)
4. \(x^2+4=0\)

Which describes the solutions to the equation \(x^2+7=0\)?

One real solution

Two real solutions

One non-real solution

Two non-real solutions

Explain how you know \(\sqrt{3x+2}=\text-16\) has no solutions.

Determine the number of real solutions and non-real solutions to each equation. Use the graphs; don't do any calculations to find the solutions.

1. \(x^2-6x+7=0\)
2. \(3x^2+2x+1=0\)
3. \(\text-x^2-3x+2=0\)
4. \(x^2-6x+7=\text-2\)
5. \(\text-x^2-3x+2=6\)
6. \(3x^2+2x+1=2\)

\(y=x^2-6x+7\)

\(y=3x^2+2x+1\)

\(y=\text-x^2 - 3x +2\)

1. Write \((5-5i)^2\) in the form \(a+bi\), where \(a\) and \(b\) are real numbers.
2. Write \((5-5i)^4\) in the form \(a+bi\), where \(a\) and \(b\) are real numbers.

What number \(n\) makes this equation true?

\(x^2+11x+\frac{121}{4} = (x+n)^2\)

\(\frac{11}{4}\)

\(\frac{11}{2}\)

11

\(\frac{121}{4}\)