Prove that the value of expression 9^7+3^12 is divisible by 90. also, prove that 25^9+5^17 is divisible by 30. answer asap plz will be awarded brainliest answer

It is prove that,

is divisible by 90.

is divisible by 30.

can be written as,

Therefore, is divisible by 90.

can be written as,

Therefore, is divisible by 30.

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i think the answer is b x = 1, y = 35/2