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7 December, 06:06

Choose the expression that represents a quadratic expression.

a. 9x - 2

b. 5x^2 + 9x - 1

c. - 2x^3 + 8x^2 - 7x + 1

d. x^4 - 12x^3 + 8x^2 - 7x + 1

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Answers (1)
  1. 7 December, 09:14
    0
    b. 5x^2 + 9x - 1

    Step-by-step explanation:

    A quadratic expression had the highest power of the variable at 2

    x^2

    b. 5x^2 + 9x - 1

    a has the highest power as x

    c and d goes higher than x^2
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