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Identify the sum and product of the roots of the given quadratic equation.

Mathematics

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Step 1: Identify the sum and product of the roots of the given quadratic equation.
The given quadratic equation is 2x2−5x+k=02x^2 - 5x + k = 0.
The roots are x1=1+αx_1 = 1+\alpha and x2=1+βx_2 = 1+\beta.
For a quadratic equation ax2+bx+c=0ax^2+bx+c=0, the sum of roots is −ba-\frac{b}{a} and the product of roots is ca\frac{c}{a}.
Sum of roots:

(1+α)+(1+β)=−−52(1+\alpha) + (1+\beta) = -\frac{-5}{2} 2+α+β=522 + \alpha + \beta = \frac{5}{2} α+β=52−2\alpha + \beta = \frac{5}{2} - 2 α+β=12\alpha + \beta = \frac{1}{2}

Product of roots:

(1+α)(1+β)=k2(1+\alpha)(1+\beta) = \frac{k}{2} 1+α+β+αβ=k21 + \alpha + \beta + \alpha\beta = \frac{k}{2}

Substitute α+β=12\alpha + \beta = \frac{1}{2}:

1+12+αβ=k21 + \frac{1}{2} + \alpha\beta = \frac{k}{2} 32+αβ=k2\frac{3}{2} + \alpha\beta = \frac{k}{2}

Multiply by 2:

3+2αβ=k3 + 2\alpha\beta = k 2αβ=k−32\alpha\beta = k-3 αβ=k−32\alpha\beta = \frac{k-3}{2}

Step 2: Find the sum and product of the roots of the new quadratic equation.
The roots of the new quadratic equation are y1=1+α2y_1 = 1+\alpha^2 and y2=1+β2y_2 = 1+\beta^2.
Let S′S' be the sum of the new roots and P′P' be the product of the new roots.
Sum of new roots S′S':

S′=(1+α2)+(1+β2)S' = (1+\alpha^2) + (1+\beta^2) S′=2+α2+β2S' = 2 + \alpha^2 + \beta^2

We know that α2+β2=(α+β)2−2αβ\alpha^2 + \beta^2 = (\alpha+\beta)^2 - 2\alpha\beta.
Substitute the values of α+β\alpha+\beta and αβ\alpha\beta:

α2+β2=(12)2−2(k−32)\alpha^2 + \beta^2 = \left(\frac{1}{2}\right)^2 - 2\left(\frac{k-3}{2}\right) α2+β2=14−(k−3)\alpha^2 + \beta^2 = \frac{1}{4} - (k-3) α2+β2=14−k+3\alpha^2 + \beta^2 = \frac{1}{4} - k + 3 α2+β2=1+124−k\alpha^2 + \beta^2 = \frac{1+12}{4} - k α2+β2=134−k\alpha^2 + \beta^2 = \frac{13}{4} - k

Now substitute this back into the expression for S′S':

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