Answer:
<u>1</u><u> & </u><u>9</u>
Step-by-step explanation:
I believe that the numbers 1 and 9 fit the statement- as they would be 1 x 9= <u>9</u> and 1 + 9=<u>10</u>.
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Replace x with a^2:
7(a^2)^2 - 8
Multiply the exponents:
7a^4 - 8
13