Question

Look at the expression below. 1/2 (a+b) - (a-b)2. what is the value of the expression when a = 18 and b = 14?

A 32
B 12
C 8
D 0

Answer 1

8

Explanation:

`=(1)/(2)(a+b)-(a-b)*2\\\\= (1)/(2)(18+14)-(18-14)*2\\\\= (1)/(2)(32)-(4)*2\\\\=16-8=8`