Respuesta :
Answer:
- Sum of two consecutive positive integers is 27.
Step-by-step explanation:
Let two consecutive positive integers be x and (x + 1)
According to question,
➝ x² + (x + 1)² = 365
➝ x² + x² + 1 + 2x = 365
➝ 2x² + 1 + 2x = 365
➝ 2x² + 2x - 364 = 0
➝ 2(x² + x - 182) = 0
➝ x² + x - 182 = 0
➝ x² + 14x - 13x - 182 = 0
➝ x(x + 14) -13 (x + 14) = 0
➝ (x - 13) (x + 14) = 0
➝ x = 13 or - 14
But in the question x is a positive integer, so x = 13
Two consecutive positive integers are:
- x = 13
- x + 1 = 14
Hence,
- Sum of two consecutive positive integers is 13 + 14 = 27
Hey ! there
Answer:
- 27 is the answer
Step-by-step explanation:
In this question it is given that sum of square of two consecutive Integer is 365 .
And we are asked to find the sum of consecutive positive integers .
Solution : -
We are assuming first positive integer as a and second as a + 1 . According to question their square is equal to 365 i.e. ,
- a² + ( a + 1 )² = 365
Now , solving it ,
[tex] \longmapsto \qquad \: a {}^{2} + (a + 1) {}^{2} = 365[/tex]
Step 1 : Solving ( a + 1 )² using identity ( a + b )² which is equal to a² + b² + 2ab :
[tex] \longmapsto \qquad \:a {}^{2} + a {}^{2} + 1 + 2a = 365[/tex]
Step 2 : Adding like terms :
[tex] \longmapsto \qquad \:2a {}^{2} + 2a + 1 = 365[/tex]
Step 3 : Subtracting 1 on both sides :
[tex] \longmapsto \qquad \:2a {}^{2} + 2a + \cancel{1 }- \cancel{1 } = 365 - 1[/tex]
Simplifying it ,
[tex] \longmapsto \qquad \:2a {}^{2} + 2a = 364 [/tex]
Step 4 : Subtracting 364 on both sides :
[tex] \longmapsto \qquad \:2a {}^{2} + 2a - 364 = 364 - 364 [/tex]
We get ,
[tex] \longmapsto \qquad \:2a {}^{2} + 2a - 364 = 0 [/tex]
Step 5 : Taking 2 common :
[tex] \longmapsto \qquad \:2(a {}^{2} + a + 182) = 0 [/tex]
[tex] \longmapsto \qquad \:a {}^{2} + a + 182 = \dfrac{0}{2} [/tex]
[tex] \longmapsto \qquad \:a {}^{2} + a + 182 = 0[/tex]
Solving the equation :
[tex] \longmapsto \qquad \:a {}^{2} + 14a- 13a + 182 = 0[/tex]
[tex] \longmapsto \qquad \:a(a + 14) - 13(a + 14) = 0[/tex]
[tex] \longmapsto \qquad \:(a - 13)(a + 14) = 0[/tex]
Now ,
First number :
- a - 13 = 0
- a = 13
Second number :
- a + 1 . So ,
- 13 + 1
- 14
In the question we have asked to find the sum of the numbers . So adding them ,
[tex] \dashrightarrow \qquad \: 13 + 14[/tex]
[tex] \dashrightarrow \qquad \: \blue{\underline{\boxed{\frak{27}}}} \quad \bigstar[/tex]
- Henceforth , sum of these consecutive positive integers is 27.