Question

Find the 4 numbers of AP whose sum is 20 and sum of their square is 180 find the 4 numbers

Answer 1

Answer:

-1, 3, 7 and 11. Check: 11+7+3–1 = 20. Correct. 1^2+3^2+7^2+11^2 = 1+9+49+121 = 180