Question

alguien que me pueda ayudar con estas ecuaciones por favor
1) (−3)(4 + 5) =
2) (3 + 7)(−4) =
3) (3 2 )(2 2 + 3) =
4) (2)(2 − 1) =
5) ( + 2)() =
6) (−8)( + 2) =
7) (5 − 7)(−1) =
8) (− 2 )(2 2 − 1) =
9) (−2)(2 2 − 5) =
10) (2)(42 – 6 + 9) =
11) (−)(4 + 5) =
12) (3 + 7)(−4) =
13) (− 2 )(2 2 + 3) =
14) (2)(2 − 1) =
15) ( 2 − + 2)(−1) =
16) (−2)(32 – 2 + 1) =
17) ( 2 − 5 − 7)(−1) =
18) (− 2 )(2 2 + 3 − 1) =
19) (−2)(2 2 – − 5) =
20) (2)(42 – 6 + 9) =

Answer 1

1) (−3)(4 + 5) = (−3)(9)= -27

2) (3 + 7)(−4) = (−4)(10)= -40

3) (3 2 )(2 2 + 3) = (9)(4+3)= 63

4) (2)(2 − 1) = (2)( 1)= 2

5) ( + 2)() =  ?

6) (−8)( + 2) =  -16

7) (5 − 7)(−1) =  (-2)(-1)= 2

8) (− 2 )(2 2 − 1) = (− 2 )(4− 1) =(− 2 )(3) = -6

9) (−2)(2 2 − 5) =  (−2)(4 − 5)=(− 2 )(-1)= 2

10) (2)(42 – 6 + 9) = (2)(45)= 90

11) (−)(4 + 5) = (−)(9) = -9

12) (3 + 7)(−4) = (10)(−4) = -40

13) (− 2 )(2 2 + 3) = (− 2 )(4 + 3) = (− 2 )(7) = -14

14) (2)(2 − 1) = (2)( − 1)=-2

15) ( 2 − + 2)(−1) =  (0)(-1)= 0

16) (−2)(32 – 2 + 1) = (− 2 )(31)= -62

17) ( 2 − 5 − 7)(−1) = ( -10 )(−1) =  10

18) (− 2 )(2 2 + 3 − 1) =  (− 2 )(4 + 2) = (-2)(6)= -12

19) (−2)(2 2 – − 5) = (−2)(4 + 5)= -18

20) (2)(42 – 6 + 9) =(2)(42 – 6 + 9) = (2)(45)= 90

ponme corona porfa