Answer:
Explanation:
Step One
Find the expression in the lower left square (the one on the left on the bottom row).
Lower Left Box on the bottom Row
2x + 3 + ax + b = 8x + 5 Subtract 2x from both sides
3 + ax + b = 8x - 2x + 5 Combine
3 + ax + b = 6x + 5 Subtract 3 from both sides
ax + b = 6x + 5 - 3
ax + b = 6x + 2
a = 6
b = 2
6x + 2 goes into the lower left square.
Do the same thing to the lower right square
Contents of box on the lower right hand side on the bottom row.
2x + 3 + ax + b = 5x - 2 Subtract 2x + 3 from both sides
ax + b = 3x - 5
a = 3
b = - 5
3x - 5 goes into the lower right square.
So the circle is the sum of
6x + 2 + 3x - 5 = ax + b
9x - 3 = ax + b
a = 9
b = - 3
The circle with the question mark contains 9x - 3