Question

Find the sum of the series 25 ^2 +26^ 2 +27^ 2 +28^ 2 +29^ 2 +30^ 2 (without using actual squaring and summation)

Answer 1

Answer:

Step-by-step explanation:

25^2=625,     51=25+26,53=26+27,55=27+28,57=28+29,59=29+30

625+(625+51)+(676+53)+(729+55)+(784+57)+(841+59)=4555