Question

a=1, b=2. c=3, d=4 m=1/2, n=2/3 p=1/4, X=0

1. (a+b) c-d
2. (a+b)(b-a)
3. (b-m)(c-n)+4a a la2

Answer 1

1) (1+2).3-4=3.3-4=9-4=5
2) (1+2).(2-1)=3.1=3
3) (2-1/2).(3-2/3)+4.1^2= 3/2.7/3+16=21/6+16=7/2+16=39/2