Exercise: evaluate the expressions for a = 2 and b = 6
(a + b)2

16

Step-by-step explanation:

Simply plug in 2 for a, then 6 for b and substitute

(2+6)2

Then do order of operations to simplify PEMDAS

First what's inside the parenthesis

(8)2

Then multiply

16.

16

Step-by-step explanation:

(2+6)2

2 TIMES 6 = 12

2 TIMES 2 = 4

12+4=16

1 3 5

step-by-step explanation:

i took the test: )

c.

step-by-step explanation:

she should of added 9^2 and 12^2. that is because it is a^2+b^2=c^2. c^2 is the hypotenuse and should always be bigger than the other two numbers. which is why she should of added 9 squared and 12 squared together instead of 15 squared.