Question

Find the value of mn if m+n = 8 and m - n = 2

Answer 1

Answer:

15

Step-by-step explanation:

m+n=8

m-n=2

Adding both eq

m+n+m-n= 8+2

2m=10

m=5

n=8-5=3

mn=5×3=15

Answer 2

m+n=8
m-n=2 add the both equations
2m=10
m=5
substitute m in m+n=8
5+n=8
n=3
mn=5x3=15