Equations8

Question 1

Quadratic equations formula

Answer 1

x =  (−b + √(b2 − 4ac)) /2a
x =  −b − √(b2 − 4ac) /2a

Question 2

Expression b² - 4ac (also called discriminant of a quadratic equation) if less than 0 then the roots are

Answer 2

Not real

Question 3

If the discriminante of a quadratic equation is a perfect square then the roots are

Answer 3

Unequal rational roots.

Question 4

If the discriminant of a quadratic equation is 0 , then the roots are

Answer 4

Equal.

Each root = -b/2a

Question 5

If the discriminant of a quadratic equation is more than 0 , then the roots are

Answer 5

Distinct and unequal roots.