Question

3.
If a = 3 and b = 5, find the value of:
(a) a2 – b2
(b) a3 + b3 + 2ab​

Answer 1

Answer:

a^2-b^2=-16

a^3+b^3+2ab=182

Step-by-step explanation:

here is ur answer

hope it helps

Answer 2

$a) {a}^{2} - {b}^{2} \\ = > {3}^{2} \: - {5}^{2} \\ = > (3 \times 3) - (5 \times 5) \\ = > 9 - 25 \\ = > - 16$

$b) {a}^{3} + {b}^{3} + 2ab \\ = > {3}^{3} + {5}^{3} + (2 \times 3)(2 \times 5) \\ = > (3 \times 3 \times 3) + (5 \times 5 \times 5) + (6 \times 10) \\ = > 27 + 125 + 60 \\ = > 212$