See what we can offer to your school
"SimpleStudy just makes sense...”
Get the best plan for your school
20 questions from this quiz
Quadratic formula
az2+bz+c=0az^2+bz+c=0az2+bz+c=0
Negative number under square root
Error from negative under square root
222
−4-4−4
2i2i2i
In conjugate pairs
The calculations
−52-\frac{5}{2}−25
b2−4acb^2 - 4acb2−4ac
When b2−4ac<0b^2 - 4ac < 0b2−4ac<0
−1-1−1
x=−b±b2−4ac2ax=\frac{-b\pm\sqrt{b^2-4ac}}{2a}x=2a−b±b2−4ac
For exam marks
ax2+bx+c=0ax^2+bx+c=0ax2+bx+c=0
Complex roots
131313
Select your subjects, and get access to A+ resources today.