Question

If a $ b = 2, where a $ b = a² - b, what is the value of a and b?

• A. 2,2
• B. 8,1
• C. 4,5
• D. 9,6

Answer 1

Answer:

A. 2,2

Given:

a $b =$a^2 - b$<br></p><p data-pxy="true" style="color: rgb(0,0,0); margin-top: 2px; margin-bottom: 2px;">and</p><p data-pxy="true" style="color: rgb(0,0,0); margin-top: 2px; margin-bottom: 2px;"><br>a$ b = 2

So we need:

$a^2 - b = 2$

Check the options:

1. (2, 2): (2^2 - 2 = 4 - 2 = 2)

2. (8, 1): (8^2 - 1 = 64 - 1 = 63)

3. (4, 5): (4^2 - 5 = 16 - 5 = 11)

4. (9, 6): (9^2 - 6 = 81 - 6 = 75)

Correct answer: (2, 2).