Question

Evaluate: a+b+a+a , where a=−5 and b=−5 A. -14 B. -20 C. -19 D. -15

Answer 1

a+b+a+a
a= -5
b= -5
(-5)+(-5)+(-5)+(-5)
-sign takes over once bracket is open (the multiplication rule - x + = - )
-5-5-5-5
= -20
Correct answer is B