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HonoursStudent

  • 2 years ago

Hi , It doesnt seem like this can be solved to x : (3x+2)(4x+10)

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  1. mark_o.
    • 2 years ago
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    are these equal to zero?

  2. mark_o.
    • 2 years ago
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    (3x+2)(4x+10) =0 ?

  3. HonoursStudent
    • 2 years ago
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    I end up with the following awnser 6x2 + 38x + 20 = 0 so nothing in c will multiply to the sum of b

  4. HonoursStudent
    • 2 years ago
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    In the book it is not equal to 0 it says evaluate the following (3x+2)(4x+10)

  5. mark_o.
    • 2 years ago
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    (3x+2)(4x+10) =12x^2 + 8x+30x+20 =12x^2 +38x +20 thats all you can do to it unless you want to find its root or zeros

  6. HonoursStudent
    • 2 years ago
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    ok o just simplified it more. wont affect any marks ?

  7. HonoursStudent
    • 2 years ago
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    woops i wrote it wrong 6x2+19x+10 = 0

  8. HonoursStudent
    • 2 years ago
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    so thats the most simplified awnser.

  9. mark_o.
    • 2 years ago
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    that ok, so if you want to equate them to zero, either you use the quadratic formula or the one already factored earlier w/c result x=-2/3,-5/2

  10. HonoursStudent
    • 2 years ago
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    ok so if i cant solve it ill have to use x = -b +_ square root b 2 - 4ac / 2a

  11. mark_o.
    • 2 years ago
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    no, only if the problem says determine its zero or roots by equating them to zero, also if you cant factor them anymore, then you can also use the quadratic formula .... try to solve it using the formula lets see what the zeroes

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spraguer (Moderator)
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