Question

help math is not my subject

Answer 1

First you would do 3-9 which is -6 then -4-1 which is -5 then since the parenthesis are close to each other you would multiply and you should get

30 

Answer 2

(3 - 9)(-4 - 1)

Order of operations =  PEMDAS
P = Parentheses 
E = Exponents 
M = Multiplication 
D = Division
A = Addition
S = Subtraction 

(3 - 9)(-4 - 1)
(-6)(-4 - 1)
(-6)(-5)
30

(3-9)(-4 - 1) = 30