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scottie21

  • 3 years ago

Give the values of a, b, and c from the general form of the equation (2x + 1)(x - 2) = 0.

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  1. aussy123
    • 3 years ago
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    you can foil the problem by multiplying everything in

  2. aussy123
    • 3 years ago
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    the first parenthesis by everything in the second

  3. aussy123
    • 3 years ago
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    |dw:1351610166859:dw|

  4. scottie21
    • 3 years ago
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    ok thanks can you help me with this one now

  5. scottie21
    • 3 years ago
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    The line of symmetry of the parabola whose equation is y = ax2 - 4x + 3 is x = -2. What is the value of "a"?

  6. aussy123
    • 3 years ago
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    im not sure, but i think you are supposed to substitute -2 in for x y = ax2 - 4x + 3 y= a(-2)^2-4x+3 y= 4a-4(-2)+3 y= 4a+8+3 y= 4a+11 -11 -11 _______________________________ y/4-11/4=4a/4 11-y/4 = a Im not sure! though

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