ASK A QUESTION Solve by using methods of factoring, square root principle or quadratic formula.

Question

The profu of two consecutive even integers is 624. find the numbers

Answer 1

PLZ consider this "difficult" problem:  "What is 19*21?"

 

Well, 20*20=400 and (n-1)(n+1) = n² -1.  So, if n=20, then 19*21 is 399.

 

Now, if n is the ODD integer between the two EVEN integers, and (n² -1) = 624, then n² = 625 and n=25.

The even integers are 24 and 26.

 

Check:   24*26 = 624