**Question 6: Quadratic Equation Problem**Let $ p $ be a prime number and $ k $ an integer such that the quadratic equation $ x^2 + kx + p = 0 $ has two positive integer solutions. What is the value of $ k + p $?**Options:**- ○ 1- ○ -1- ○ 0- ○ 2- ○ -2**Solution Explanation:**To solve this problem, we determine the conditions under which the quadratic equation has two positive integer solutions. The roots of the equation are solutions to:\[ x^2 + kx + p = 0 \]Using Vieta’s formulas, if the roots are $ r_1 $ and $ r_2 $, then:1. The sum of the roots $ r_1 + r_2 = -k $2. The product of the roots $ r_1 \cdot r_2 = p $Since $ r_1 $ and $ r_2 $ are positive integers, and $ p $ is a prime number, the only possible values for $ r_1 $ and $ r_2 $ are $ 1 $ and $ p $, giving us:\[ r_1 = 1, \, r_2 = p \quad \text{or} \quad r_1 = p, \, r_2 = 1 \]In both scenarios, $ r_1 + r_2 = 1 + p $.Thus:\[ -k = 1 + p \Rightarrow k = -(1 + p) \]To find $ k + p $:\[ k + p = -(1 + p) + p = -1 \]Hence, the correct answer is $-1$.

Let 'a' and 'b' be the two positive integer solutions of the quadratic equation x2+kx+p=0, where p…

Answered: 6. Let p be a prime number and k an…

6. Let p be a prime number and k an integer such that x 2 + kx + p = 0 has two positive integer solutions. What is the value of k+ p? 1 O -1 O 2 O -2

Advanced Engineering Mathematics

10th Edition

ISBN:9780470458365

Author:Erwin Kreyszig

Publisher:Erwin Kreyszig

Chapter2: Second-order Linear Odes

Section: Chapter Questions

Problem 1RQ

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