Answer:
1. 11
2. 30
3. -3
Step-by-step explanation:
1. 3²+(2³÷4)+3×2-6 write the (4) in exponential form with base of 2
3²+(2³÷2²)+3×2-6 multiply the (3×2)
3²+(2³÷2²)+6-6 calculate the qoutient (2³÷2²)
3²+2+6-6 since the two opposites (+6-6) add up to zero, remove them from the expression
3²+2 evaluate the power (3²)
9+2 add the numbers
= 11
2. 12+(3²-6)+15 evaluate the power (3²)
12+(9-6)+15 subtract the numbers (9-6)
12+3+15 calculate the sum of the positive numbers (12+3+15)
=30
3. (9+6)-6²+(72÷4) add the numbers (9+6)
15-6²+(72÷4) evaluate the power (6²)
15-36+(72÷4) divide the numbers (72÷4)
15-36+18 calculate the sum or the difference (15-36+18)
=-3
