Question

What are the solution of -b²w²+81

Answer 1

Answer:

bw = -9 or 9

Step-by-step explanation:

We know that,

a^m × b^m = (a × b)^m

also,

a² - b² = (a + b)(a - b)

Now,

-b²w² + 81 = 0

= 81 - b²w² = 0

= 9² - (bw)² = 0

Using identity,

(9 + bw)(9 - bw) = 0

Thus,

bw = -9 or 9

Hope it helped and believing you understood it........All the best