SOLUTION: The units digit of a two digit number is 1 less than twice the tens digit. The square of the tens digit is 9 more than the units digit. Find the number.
Algebra.Com
Question 447202: The units digit of a two digit number is 1 less than twice the tens digit. The square of the tens digit is 9 more than the units digit. Find the number.
Answer by jorel1380(3719) (Show Source): You can put this solution on YOUR website!
2x=y+1
x2=y+9
2x-1=y
x2=2x-1+9
x2-2x-8=0
(x-4)(x+2)=0
x=4 or -2
Throwing out the negative number, we get x=4, y=7; thus the number is 47..
RELATED QUESTIONS
the tens digit of a two digit number is 5 more than the units digit. five times the units (answered by mananth)
the tens digit of certain two digit number exceeds the units digit by 4 and is 1 less... (answered by mananth,MathTherapy)
The tens digit of a two-digit number is 2 less than twice the units digit. The number is... (answered by Nate,stanbon)
The product of a two-digit number and its tens digit is 285. The units digit is two more... (answered by ankor@dixie-net.com)
The tens digit of a two-digit number is 1 more than three times the units digit. If the... (answered by math_helper)
the difference between the tens digit and the unit digit of a two digit number is 3.... (answered by nerdybill)
The tens digit of a two-digit number is 1 more the twice the units digit. The number is... (answered by Nate)
A two digit number is two less than six timers the sum of its digits. The tens digit is... (answered by Paul)
The sum of the digits of a two-digit number is 13. Twice the tens digit is two less than... (answered by josgarithmetic)