Sure, let's go through part (a) step-by-step.
### Part (a)
Given the expression [tex]\((20)^2 - (16)^2\)[/tex], we need to find its value.
1. Calculate [tex]\((20)^2\)[/tex]:
- [tex]\((20)^2\)[/tex] means [tex]\(20\)[/tex] multiplied by [tex]\(20\)[/tex]:
[tex]\[
20^2 = 20 \times 20 = 400
\][/tex]
2. Calculate [tex]\((16)^2\)[/tex]:
- [tex]\((16)^2\)[/tex] means [tex]\(16\)[/tex] multiplied by [tex]\(16\)[/tex]:
[tex]\[
16^2 = 16 \times 16 = 256
\][/tex]
3. Subtract [tex]\((16)^2\)[/tex] from [tex]\((20)^2\)[/tex]:
- Now, we subtract the square of [tex]\(16\)[/tex] from the square of [tex]\(20\)[/tex]:
[tex]\[
400 - 256 = 144
\][/tex]
So, the value of [tex]\((20)^2 - (16)^2\)[/tex] is:
[tex]\[
144
\][/tex]
That completes part (a).
Let’s move on to part (b). Please provide more details or the specific question for part (b).
