Question

$(5a - \frac{b}{5} ) {}^{2} - (5a + \frac{b}{5} ) {}^{2}$
​

Answer 1

Explanation:

^{2}(5a−

5

b

)

2

−(5a+

5

b

)

2

Answer 2

Answer:

u can use the identity

a²-b² = (a+b) (a-b)

........