Distribute Constant: Distribute the constant 13xy2 across the expression −9x4y. We multiply the coefficients (13 and −9) and add the exponents of like bases (x and y). 13×−9=−117x1×x4=x(1+4)=x5y2×y1=y(2+1)=y3
Combine Results: Combine the results from Step 1 to form the simplified expression.−117x5y3