Question

The sum of two number is 20 and their difference is 8. Find their product. ( A ) 84 ( B ) 325 ( C ) 105 ( D ) 315

Answer 1

Answer:

(A) 84

Step-by-step explanation:

let the two numbers be x and y

condition 1: sum of two numbers is 20

x+y=20 ( equation 1)

condition 2: their difference is 8

x-y=8 (equation 2)

add equation 1 and 2

x+y=20

x -y=8 { +y and -y gets

= 2x =28 cancelled }

x=14

substitute 'x=14' in equation 1

x+y=20 (equation1)

14+y=20

y=20-14

y=6

Hence , the two numbers are 14 and 6

Now,

Their product is

14×6=84

Answer 2

fin find the product of sum of -8 and -9 with a difference of -20 and -5