The product of two numbers is 42. Their difference is 1. What is the largest of the two numbers?
3 answers
The largest of the two numbers is 21.
AAAaannndd the bot gets it wrong yet again!
6*7 = 42
6*7 = 42
a * b = 42
a - b = 1 so a = b + 1
( b + 1 ) b = 42
b^2 + b - 42 = 0
b = [ -1 +/- sqrt( 1 + 168 ) ] /2 = [-1 +/- 13 ] / 2 = -7
a = - 6
- 6 is to the right of -7 on number line
a - b = 1 so a = b + 1
( b + 1 ) b = 42
b^2 + b - 42 = 0
b = [ -1 +/- sqrt( 1 + 168 ) ] /2 = [-1 +/- 13 ] / 2 = -7
a = - 6
- 6 is to the right of -7 on number line
0 answers