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6 May, 21:38

What are the factors of 5y^2-2y-7

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Answers (2)
  1. 6 May, 22:13
    0
    Answer:7/5, - 1

    Step-by-step explanation:

    all quadratic equations have 2 roots so meaning it is factorized into to bracts so first step

    (5y) (y)

    the reason there is a five before one of the y's is because the a in our function {ax^2+bx+c}

    second step is to factorize so u think what 2 numbers are equal to - 7 when multiplied. since 7 is a prime number its either 7 and - 1 or - 7 and 1

    so u try both factors to check the middle term

    first one

    (5y+7) (y-1)

    that would be equal to 5y^2+2y-7 which isn't the function we are looking for therefore the

    second one (5y-7) (y+1)

    that would be equal to 5y^2-2y-7 which is correct
  2. 6 May, 22:46
    0
    The correct answer is 7/5 and - 1
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