SOLUTION: Compute 123456789^2-2*123456789*123456787+123456787^2 without a calculator.
Algebra
->
Quadratic Equations and Parabolas
->
Quadratic Equations Lessons
-> SOLUTION: Compute 123456789^2-2*123456789*123456787+123456787^2 without a calculator.
Log On
Quadratics: solvers
Quadratics
Practice!
Practice
Answers archive
Answers
Lessons
Lessons
Word Problems
Word
In Depth
In
Click here to see ALL problems on Quadratic Equations
Question 1019654
:
Compute 123456789^2-2*123456789*123456787+123456787^2 without a calculator.
Answer by
FrankM(1040)
(
Show Source
):
You can
put this solution on YOUR website!
A= 123456789
B= 123456787
And your problem says
A^2-2AB+B^2
which factors to
(A-B)(A-B)
We can see that A-B=2 above so the answer is 4.