We know that all polynomials are algebraic expressions.
And -8 is a polynomial (monomial) of degree zero. Is -8 an algebraic expression ?
And is it true that algebraic expression should have at least one variable?

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Solution

$W h e n y o u s a y t h a t a l l p o l y n o m i a l s a r e a l g e b r a i c e x p r e s s i o n t h e n - 8 s h o u l d a l s o b e a n a l g e b r a i c e x p r e s s i o n a s - 8 i s a c o n s \tan t p o l y n o m i a l (a m o n o m i a l o f d e g r e e 0) . N o a n a l g e b r a i c e x p r e s s i o n n e e d n o t a l w a y s h a v e s o m e v a r i a b l e . I t c a n b e a c o n s \tan t a s i n t h e c a s e a b o v e$

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