Multiply.
(-7x^4y^2)(9x^2y^3)
To multiply these terms, you can multiply the coefficients together and then add the exponents for each variable.
The coefficients are -7 and 9, so their product is -7 * 9 = -63.
For the variable with the base x, you add the exponents together: 4 + 2 = 6.
For the variable with the base y, you add the exponents together: 2 + 3 = 5.
So the final expression is -63x^6y^5.