Algebra - number pattern

[elmer]

I have no idea how to set this problem up for solving.
What is the next number in the pattern: -64, +49, -36, +25, _____ :?:

 

[Deleted member 4993]

I have no idea how to set this problem up for solving.
What is the next number in the pattern: -64, +49, -36, +25, _____ :?:

Did you stare at the problem for a while?

Think about square of numbers....

 

[krishnan]

subotosh is right. it comes as 8^2 , 7^2 , 6^2 , 5^2 and so on with the signs coming interchangeably. the next number in the series will be -4^2 = -16

 

[mmm4444bot]

with the signs coming interchangeably

I think that you mean "with the signs alternating".