Question

Find the value:

mn if m + n = 8 and m - n = 2​

Answer 1

Answer:

m + n = 8 ...(1)

m - n = 2 ...(2)

2m = 10

m = 5

substituting m = 5 in eq eq 1

5 + n = 8

n = 3

so m = 5

n = 3

Answer 2

Answer:

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Here,

m + n = 8 ----------1

m - n = 2 -------------2

Adding equation 1 and 2, we get

m + n + m - n = 8 + 2

2m = 10

m = 5

Then,

putting the value of m in equation 1,

m + n = 8

5 + n = 8

n = 3

Hence, m = 5 and n = 3

$\huge\boxed{\fcolorbox{black}{yellow}{HOPE \: IT \: HELPS}}$