Question

15=36 16=49 17=65 18=?​

Answer 1

Answer:

hope it helps pl mark as brainliest

Step-by-step explanation:

answer    should be 84 as       diffrence  

between 49 and 36 = 13 and between 65 and 49 = 16

so i added 19 to 65 to get 84

Answer 2

Answer:

Required value of 18 is 81.

Step-by-step explanation:

Given,

$15 = 36 \\ 16 = 49 \\ 17 = 65$

Here we want to find value of 18.

This is a problem of General inteligence part of Mathematics.

If we look it carefully then we can understand that here all term maintain a sequence.

Here, $15 = 1 + 5 = 6$

and ${6}^{2} = 36$

Again,$16 = 1 + 6 = 7$

and ${7}^{2} = 49$

Again,$17 = 1 + 7 = 8$

and ${8}^{2} = 64$

So,we can say if pq is a number then

$pq = {(p + q)}^{2}$

So,$18 = (1 + 8) = 9$

So, required answer is ${9}^{2} = 81$

This is a problem of Algebra.

Some important Algebra formulas.

(a + b)² = a² + 2ab + b²

(a − b)² = a² − 2ab − b²

(a + b)³ = a³ + 3a²b + 3ab² + b³

(a - b)³ = a³ - 3a²b + 3ab² - b³

a³ + b³ = (a + b)³ − 3ab(a + b)

a³ - b³ = (a -b)³ + 3ab(a - b)

a² − b² = (a + b)(a − b)

a² + b² = (a + b)² − 2ab

a² + b² = (a − b)² + 2ab

a³ − b³ = (a − b)(a² + ab + b²)

a³ + b³ = (a + b)(a² − ab + b²)

Know more about Algebra,

1) https://brainly.in/question/13024124

2) https://brainly.in/question/1169549

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