Answer ( 1 )

  1. Solution
    Using the formula b² = 4ac for perfect square
    Where:
    b = 18
    a = 9
    c = k
    Then
    b² = 4ac
    18² = 4(9) x c
    324 = 36c
    Divide by 36 both sides
    324/36 = 36c/36
    c = 9
    Therefore the value of k is 9

    Best answer
    Cancel the best answer

Leave an answer