Question

Simplify.

#1.

9^2-1

___________

4+6^2-10





#2.

10(19-4^2)

_______________

7+3^2-1

Answer 1

1. 80

2. 30

3. 15

Explanation:

1. 9^2=81 ...81-1=80

2. 4^2= 16 so..10(19-16)-> 10(3)= 30

3. 3^2= 9 so... 7+9-1-> 7+9=16 16-1=15

Answer 2

Explanation:

#1

9^2-1

(9×9)-1

81-1

80

#2

10(19-4^2)

10(19-16)

10(3)

30