See what we can offer to your school
"SimpleStudy just makes sense...”
Get the best plan for your school
10 cards from this deck
If z=a+biz = a + biz=a+bi is root, z∗=a−biz^* = a - biz∗=a−bi also root (real coeffs)
Complex/imaginary
z∗=a−biz^* = a - biz∗=a−bi
Always real
In conjugate pairs
Complex roots in pairs; can't have exactly 3 complex
x=−b±b2−4ac2ax = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a}x=2a−b±b2−4ac
Use conjugate pair; both roots needed
x2−(α+β)x+αβ=0x^2 - (\alpha + \beta)x + \alpha\beta = 0x2−(α+β)x+αβ=0
Select your subjects, and get access to A+ resources today.