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19 January, 15:04

Solve the quadratic by quadratic formula below

x squared-14x=-49

+2
Answers (2)
  1. 19 January, 16:40
    0
    X^2-14x+49=0

    Factor

    (x-7) (x-7)

    Check

    -7-7=-14

    -7*-7=49

    Use ZPP

    x-7=0

    x=7

    Final answer: x=7
  2. 19 January, 18:02
    0
    Equation ax²+bx+c=0 arrange the equation x²-14x+49=0 a=1 b=-14 c=49

    General Formula = b + or - √b²-4ac/2a by substituting gives us

    -14 + or - √0/2 so we have one answer because 4ac is to b2 and √0 = 0 - 14/2 = - 7 The answer is one solution - 7. If you want and extra hint there it is: b²-4ac is called the discriminant because it shows you how many solutions the equation will have if it's positive then it's 2 solutions and if it's zero then it's one solution and if it's negative no solution because b²-4ac is under a root and if a negative number is under a square root then it's undefined.
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