Question

if the product of two number is105 one of that number is -21 find another number​

Answer 1

Answer:

other number is -5.......

Answer 2

• The other number = –5.

Given :–

• The product of two number = 105.
• One number = –21.

To Find :–

• The other number.

Solution :–

Let,

The other number be x.

According to the question,

One number × Other number = Product of both numbers

We have,

• One number = –21.
• Product of both numbers = 105.

Now,

Substitute the values.

$\mapsto - 21 \times x = 105$

$\mapsto - 21x = 105$

$\mapsto x = \cancel\dfrac{105}{ - 21}$

$\mapsto x = - 5$

Hence,

The other number is –5.

Verification :–

One number × Other number = Product of both numbers

Now we have,

• One number = –21.
• Other number = –5.
• Product of both numbers = 105.

Now, substitute all the values.

$\mapsto - 21 \times ( - 5) = 105$

We know that,

• Negative × Negative = Positive.

So,

$\mapsto 105 = 105$

Hence Verified ! !