Quadratic equation Quadratic equation ? has roots x_{1} = -47 and x_{2} = -79. Calculate the coefficients b and c.

Equation Equation ? has one root x_{1} = 10. Determine the coefficient b and the second root x_{2}.

Discriminant Determine the discriminant of the equation: ?

Variations 4/2 Determine the number of items when the count of variations of fourth class without repeating is 552 times larger than the count of variations of second class without repetition.

AS sequence In an arithmetic sequence is given the difference d = -2 and a_{78} = 518. a) Determine the value of a_{67} b) Determine the sum of 78 members.

Product The product of two consecutive odd numbers is 899. What are this numbers?