Verified answer

-6 x -15 = 90

-6 x (-6+9)

-6 x 3 = -18

6 x (6-9)

6 x -3 = -18

6 x (6+9)

6 x 15 = 90

starting from inside the brackets

1) -6+-9=-15 then * -6 =90

2) -6+9=3 then 3*-6 = -18

3)6-9= -3 THEN 6*-3= -18

4) 6+9=15 THEN * 6=90

the first problem is -6*-6 which is 36, + -6*-9 which is 54. so the answer would be 90.

you can work the rest out in the same manner

The first one - do -6 + -9 first which is -15, then you do -15 times -6 which is 90

Just do the ones inside the square bracket first then times the one outside the square bracket. and remember:

-n *+n = -n

-n * -n = +n

hope this help :)

1. 90

2.-18

3.-18

4. 90