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8 December, 16:58

Which equation is quadratic in form?

a. 6 (x + 2) ^2 + 8x + 2 + 1 = 0

b. 6x^4 + 7x^2 - 3 = 0

c. 5x^6 + x^4 + 12 = 0

d. x^9 + x^3 - 10 = 0

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Answers (1)
  1. 8 December, 17:14
    0
    Hello,

    A is one: 6 (x+2) ²+8x+2+1=0==>6 (x²+4x+4) + 8x+3=0

    ==>6x²+32x+3=0

    B is one (une bicarrée (two squared?)

    6x^4+7x^2-3=0

    ==>6 (x²) ^2+7 (x²) - 3=0

    C is not (a cubic one)

    D is one x^9+x^3-10=0 (une bicarrée)

    (x^3) ² + (x^3) - 10=0
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