Answer:
A: 6x^8y^5
B: 4x^4z^8
C:12a^9b^7
D:6s^9t^3
Explanation:
When you multpily exponents with the same base you just add them
You still multiply the real numbers like you normally would though
so we have
3x²y^4*2x^6y
To do this you multiply 3*2=6
add the exponents on x^2 and x^6=x^8
and add the exponents on y (which is equal to y^1) and y^4=y^5
put these together and get 6x^8y^5
B: I won't explain it twice because it's the same process
I get 4x^5z^8
C: 12a^9b^7
D: 6s^9t^3