Question

For which number the product of its successor and predecessor is 99 explain how??

Answer 1

Answer:

The required number is 10.

Answer 2

10

Step-by-step explanation:

let the number be X

(X+1)(X-1)=99

X²-1=99

X²=99+1

X=√100

X=√(10)² (square se root cancel)

X=10