Try it on paper first. A hint, the key idea and the worked solution are here when you need them.
Solve . Give the real part and the positive imaginary part of the roots to 3 decimal places, and check the product of the roots.
For with real coefficients and , the roots are , a conjugate pair. Their sum is and their product is . A square root of has , and .
Have you tried it?
Work it out on paper first. It is fine to get stuck or make a mistake: that is how we learn. When you are ready, go through the solution one step at a time, and check each step against your own.
Step 1. The discriminant. .
Step 2. The roots. .
Step 3. The decimals. and .
Step 4. Check. The product is .
Answer: , with real part and imaginary parts .
Log in to join the discussion.
Loading…
With Standard, you also open 11 more problems, 2 Python labs and 1 extra course. Everything you have used here stays free, always.