Answer:
A) the sum of the squares of 0.5 and 5.3n
![=(0.5)^2+(5.3n)^2](https://img.qammunity.org/2020/formulas/mathematics/college/datgz42b4i3zj6ktl13c7xfckxefwslmik.png)
B)the square of the sum of 3a and 1/3 b
sum of 3a and 1/3 b =
![3a+(1)/(3)b](https://img.qammunity.org/2020/formulas/mathematics/college/4h12pzstem21ykush9mlwf0kh6h7gb6oem.png)
The square of the sum of 3a and 1/3 b =
![(3a+(1)/(3)b)^2](https://img.qammunity.org/2020/formulas/mathematics/college/cnrecg20aycqs49hmv5g2kt69zq1qeznx0.png)
C)the product of
and
![9y^2](https://img.qammunity.org/2020/formulas/mathematics/middle-school/54bly7h1lnuxus2j8makj9xqf25oijcp1v.png)
![0.6x^2 * 9y^2](https://img.qammunity.org/2020/formulas/mathematics/college/1nc78rq4xwd0qfqsw7vbt2r72v9dt35zv0.png)
D)the product of the sum and the difference between 8x and 4y
Sum of 8x and 4y = 8x+4y
Difference between 8x and 4y = 8x-4y
The product of the sum and the difference between 8x and 4y =
![(8x+4y)(8x-4y)](https://img.qammunity.org/2020/formulas/mathematics/college/28tvr1p58dc7ldi8511x6wfd2j9ez2qvc4.png)