Question 927385: The square of a number exceeds the number by 72. Find the number
Answer by TimothyLamb(4379)   (Show Source):
You can put this solution on YOUR website! xx = x + 72
xx - x - 72 = 0
---
the above quadratic equation is in standard form, with a=1, b=-1 and c=-72
---
to solve the quadratic equation, by using the quadratic formula, copy and paste this:
1 -1 -72
into this solver: https://sooeet.com/math/quadratic-equation-solver.php
---
the quadratic has two real roots at:
---
x = 9
x = -8
---
either root works fine for this problem:
---
answer:
x = 9
OR
x = -8
---
Solve and graph linear equations:
https://sooeet.com/math/linear-equation-solver.php
---
Solve quadratic equations, quadratic formula:
https://sooeet.com/math/quadratic-formula-solver.php
---
Solve systems of linear equations up to 6-equations 6-variables:
https://sooeet.com/math/system-of-linear-equations-solver.php
|
|
|
