3. 🐐

10. Don’t forget to square the coefficients 6 and -3. And 🐐.

31. 🐐

37. For two binomials to multiply together into a binomial, they must be conjugates of each other so that the middle term cancels.

40. y3 squared is y6. And 🐐.

42. These are conjugates of each other, so there will be no middle term in the answer.