Question

5.
Find the value of the expression (m – n) + (m + 8) , when m= 30 and n =8

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Answer 1

Step-by-step explanation:

30-8 * 30+8 = 30^2 - 8^2 = 900-64

= 836

here, we used (a+b)(a-b)= a^2 - b^2

Answer 2

Answer:

m = 30

n = 8

m - n = 30 - 8 = 22

m + 8 = 30 + 8 = 38

now (m - n) + (m + 8) = 22 + 38 = 60