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Lv 5
? asked in Science & MathematicsMathematics · 6 years ago

Need help with a math problem?

7 + 2x ^4 =89

3 Answers

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  • Puzzling
    Lv 7
    6 years ago

    Start by subtracting 7 from both sides:

    2x^4 = 89 - 7

    2x^4 = 82

    Now divide both sides by 2:

    x^4 = 41

    Now take the fourth root of both sides:

    x = ±∜41

  • ?
    6 years ago

    Use bedmas

    Brackets

    exponents

    Division

    Multiplication

    Addition

    Subtraction

    In that order

    Also get x on its own to find out its' value

  • ?
    Lv 6
    6 years ago

    So the fourth root of 41 is approx +2.53 -2.53 +2.53i and -2.53i

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