Question

find two consicutive natural number whose product is 20​

Answer 1

Answer:

Ans :4,-5

Hint :

Let the numbers be x and x + 1. Then,

x(x + 1) = 20

⇒x

2

+ x - 20 = 0

⇒(x+5)(x−4)=0

Answer 2

Answer:

4 and 5

Step-by-step explanation:

Let n be the natural number then next consecutive number will be ( n + 1)

it's given that

n(n+1) = 20

n^2 + n = 20

n^2 + n - 20 = 0

n^2 + 5n - 4n -20 =0

n(n+5) -4( n + 5) = 0

( n+ 5) ( n - 4) = 0

so either n = -5 or n = 4

but we let that n is a nautral number

so only value of n acceptable here is 4

so n = 4 first number

second number = ( n + 1) = 5

so the numbers are 4 and 5

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