Question

the
sum of two number is 10 and their products is 21, find the number.
​

Answer 1

Answer:

sum=7+3. product=7*3

Step-by-step explanation:

sum of 7 and 3 is 10

and product of 7 and 3 is 21

Answer 2

$\bf\underline{\underline{\blue {SOLUTION:-}}}$

Question

• The sum of two number is 10 and their products is 21, find the number?

Given

• Sum of Two numbers = 10
• And product = 21

To Calculate

• Numbers__?

Step by step explanation

Let the first number be x

So,

Second number = 10-x

According to Question

➩ x× ( 10-x) = 21

➩ 10x -x²= 21

➩ 10x-x²-21=0

➩ x²-10x+21=0

➩ x²-(7+3)x+21=0

➩ x²-7x-3x+21=0

➩ x(x-7)-3(x-7)=0

➩ (x-7)(x-3)=0

➩ x-7=0,x-3=0

➩ x=7 , x=3

$\bf\underline{\underline{\blue{HENCE:-}}}$

When,

x= 7

First number = 7

Second number = 10-x= 10-7 =3

When

x=3

First number = 3

Second number = 10-x= 10-3 = 7

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