Answer:
To simplify the given expressions, we can use the property of exponents that states:
x^m * x^n = x^(m+n)
Using this property, we can simplify (x^4) (x^2) as:
(x^4) (x^2) = x^(4+2) = x^6
Similarly, we can simplify (x^3) (x^5) as:
(x^3) (x^5) = x^(3+5) = x^8
Therefore, (x^4) (x^2) and (x^3) (x^5) simplify to x^6 and x^8 respectively.