Question

Prove that the value of 9^7+3^12 is divisible by 90
PLEASE HELP ASAP

Answer 1

90(3^10) is divisible by 90.

Explanation:

9^7+3^12=(3^2)^7+3^12

=(3^7)^2+3^12

=(3^14)+(3^12)

=(3^12)(3^2)+3^12

=(3^12)(3^2+1)

=(3^12)(4)

=90(3^10)