Algebra

(x^2 + x) + �ã(x^2 + x) - 2 = 0

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  1. Is this supposed to say ...

    (x^2+x) + √(x^2+x) - 2 = 0 ?

    if so, then let y = √(x^2+x)
    your equation becomes

    y^2 + y - 2 = 0
    (y+2)(y-1) = 0
    y = -2 or y = 1

    sub back into the substitution and you have two quadratic equations to solve.
    e.g
    √(x^2 + x) = -2 which of course cannot have a real number solution and
    √(x^2+x) = 1
    square both sides and proceed from there.

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    posted by Reiny
  2. A line passes through the points whose coordinates are (c,3c) and (2c,5c).Assuming that c is not 0 find the slope of the line

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