Cari simplifies the expression (5 + 4) 2− 5 × 2. Part A Cari shows her work on the board. Use numbers and words to explain her mistake. (5 + 4) 2− 5 × 2 (5 + 16) − 5 × 2 21 − 5 × 2 16 × 2 32

Please see explanation for answer.

Step-by-step explanation:

Simplifying the expression

5 + 4) 2− 5 × 2

Carl's method

(5 + 4) 2− 5 × 2 first error was taking only 4 from the bracket and squaring it.

Instead of solving the bracket as a whole before solving outside. And once she got it wrong from the start, every other solving would be wrong

(5 + 16) − 5 × 2

21 − 5 × 2

16 × 2

32

The right method

In simplifying the expression, we must bring in Mind our Bodmas

Which means we tackle Brackets before division, then multiplication , then addition and lastly subtraction.

(5 + 4) 2− 5 × 2

Solving the bracket first we have

(9)2-5x2

Since there is no division, we move to multiplication and we can see two sites for multiplication(9 x 2 and 5x2)

18-10

Subtracting will give us 8 as our answer.

a .4y4

hope this !