Question

Please show work on a paper and upload it need it ASAPPP

Answer 1

126

Explanation:

it is the sum from x = 1 to x = 3

so we plug 1 to 3 in for x and add all those values

x = 1:

(3*1)^2 = 9

x=2:

(3*2)^2 = 36

x=3:

(3*3)^2 = 81

sum = 81 + 36 + 9 = 126