Quadratic equation

Quadratic equation 7x**2+bx+c=0 $    $


has roots x1 = 80 and x2 = 78. Calculate the coefficients b and c.

Result

b =  -1106
c =  43680

Solution:

Solution in text b =
Solution in text c =







Leave us a comment of example and its solution (i.e. if it is still somewhat unclear...):

Showing 0 comments:
1st comment
Be the first to comment!
avatar




To solve this example are needed these knowledge from mathematics:

Looking for help with calculating roots of a quadratic equation? Do you have a linear equation or system of equations and looking for its solution? Or do you have quadratic equation?

Next similar examples:

  1. Roots
    parabola Determine the quadratic equation absolute coefficient q, that the equation has a real double root and the root x calculate: ?
  2. Quadratic equation
    kvadrat_2 Find the roots of the quadratic equation: 3x2-4x + (-4) = 0.
  3. Cinema 4
    cinema_2 In cinema are 1656 seats and in the last row are 105 seats , in each next row 3 seats less. How many are the total rows in cinema?
  4. Tubes
    pipes_1 Iron tubes in the warehouse are stored in layers so that each tube top layer fit into the gaps of the lower layer. How many layers are needed to deposit 100 tubes if top layer has 9 tubes? How many tubes are in bottom layer of tubes?
  5. Equation with abs value
    abs_graph How many solutions has the equation ? in the real numbers?
  6. Equation
    calculator_2 Equation ? has one root x1 = 8. Determine the coefficient b and the second root x2.
  7. Combinations
    trezor_1 How many elements can form six times more combinations fourth class than combination of the second class?
  8. Discriminant
    Quadratic_equation_discriminant Determine the discriminant of the equation: ?
  9. Evaluation of expressions
    eq222_10 If a2-3a+1=0, find (i)a2+1/a2 (ii) a3+1/a3
  10. Quadratic inequation
    eq2_8 If 5x + x² > 100, then x is not
  11. Reciprocal equation 2
    parabola2 Solve this equation: x+5/x-6=4/11
  12. Variation equation
    fun2_4 Solve combinatorics equation: V(2, x+8)=72
  13. Variable
    eq2_12 Find variable P: PP plus P x P plus P = 160
  14. Quadratic function 2
    parabola1 Which of the points belong function f:y= 2x2- 3x + 1 : A(-2, 15) B (3,10) C (1,4)
  15. Combinations
    math_2 From how many elements we can create 990 combinations 2nd class without repeating?
  16. Asymptote
    asymptote What is the vertical asymptote of ?
  17. Theorem prove
    thales_1 We want to prove the sentense: If the natural number n is divisible by six, then n is divisible by three. From what assumption we started?