1) First you would multiply 3 × -4 which gives you -12
You add exponents when multiplying.
So, x^2 +x^3 = x^5 and y^3 +y^4 = y^7
Final Answer: -12x^5y^7
2) 7 times 4 is 28 and y^3 +y^5 = y^8
Final Answer: 28y^8
