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14 July, 13:52

4x^2=400 what method would you use for this? (algebraic, factoring, or quadratic formula)

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Answers (2)
  1. 14 July, 15:48
    0
    Algebraically, x=5

    Step-by-step explanation:

    First take the square root from both sides to cancel out 4x^2

    4x=sqrt (400)

    Then divide 20 by 4

    x=20/4

    You should get x=5
  2. 14 July, 16:18
    0
    x = {-10, 10} (Algebraic)

    Step-by-step explanation:

    Simplifying

    4x2 = 400

    Solving

    4x2 = 400

    Move all terms containing x to the left, all other terms to the right.

    Divide each side by '4'.

    x2 = 100

    Simplifying

    x2 = 100

    Take the square root of each side:

    x = {-10, 10}
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