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Translate the following statements into algebraic equations and solve for x and y: x is the sum of 2 and y. Five times the product of x and y, is 6 more than the square of x.

Mathematics

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Step-by-step solution

4 steps
  1. Translate the given statements into algebraic equations.

    The first statement says "xx is the sum of 2 and yy". This can be written as:

    x=2+y(1)x = 2 + y \quad (1)

    The second statement says "Five times the product of xx and yy, is 6 more than the square of xx". This can be written as:

    5xy=x2+6(2)5xy = x^2 + 6 \quad (2)
  2. Substitute equation (1) into equation (2).

    From equation (1), we can express yy in terms of xx:

    y=x−2y = x - 2

    Now, substitute this expression for yy into equation (2):

    5x(x−2)=x2+65x(x - 2) = x^2 + 6
  3. Solve the resulting quadratic equation for xx.

    Expand the left side of the equation:

    5x2−10x=x2+65x^2 - 10x = x^2 + 6

    Rearrange the terms to form a standard quadratic equation ax2+bx+c=0ax^2 + bx + c = 0:

    5x2−x2−10x−6=05x^2 - x^2 - 10x - 6 = 0 4x2−10x−6=04x^2 - 10x - 6 = 0

    Divide the entire equation by 2 to simplify:

    2x2−5x−3=02x^2 - 5x - 3 = 0

    Factor the quadratic equation:

    (2x+1)(x−3)=0(2x + 1)(x - 3) = 0

    This gives two possible values for xx:

    2x+1=0  ⟹  2x=−1  ⟹  x=−122x + 1 = 0 \implies 2x = -1 \implies x = -\frac{1}{2} x−3=0  ⟹  x=3x - 3 = 0 \implies x = 3
  4. Find the corresponding values of yy for each value of xx.

    Using the relation y=x−2y = x - 2:

    Case 1: For x=3x = 3

    y=3−2y = 3 - 2 y=1y = 1

    Case 2: For x=−12x = -\frac{1}{2}

    y=−12−2y = -\frac{1}{2} - 2 y=−12−42y = -\frac{1}{2} - \frac{4}{2} y=−52y = -\frac{5}{2}

    The values of xx and yy are:
    For the first solution: x = 3, y = 1\boxed{\text{x = 3, y = 1}}
    For the second solution: \boxed{\text{x = -\frac{1}{2}, y = -\frac{5}{2}}}

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