Question

pls solve these two questions using identities
$(5 {a}^{2} - \frac{1}{3})^{2}$
$(abc - 2) \times (abc - 7)$

​

Answer 1

Answer:

The 12 bar blues chord structure is: C/ C/ C/ C/ F/ F/ C/ C/ G/ F/ C/ C

Using this to help you, put the parts of the 12 bar blues in order from beginning (at the top) to the end (at the bottom)

Answer 2

Answer:

1) (5a² - (1/3))² = 25a⁴ - (10a²/3) + (1/9)

2) (abc - 2)(abc - 7) = a²b²c² - 9abc + 14

Step-by-step explanation:

We have,

1)

(5a² - (1/3))²

Using the identity,

(x - y)² = x² - 2xy + y²

Here,

x = 5a²

y = (1/3)

Then,

(5a² - (1/3))²

= (5a²)² - 2(5a²)(1/3) + (1/3)²

= 25a⁴ - (10a²/3) + (1/9)

Hence,

(5a² - (1/3))² = 25a⁴ - (10a²/3) + (1/9)

2)

(abc - 2)(abc - 7)

Using the identity,

(x - m)(x - n) = x² - (m + n)x + mn

I took different variables to not confuse ourselves, it's the same what you learned.

Here,

x = abc

m = 2

n = 7

Then,

(abc - 2)(abc - 7)

= (abc)² - (2 + 7)(abc) + (2)(7)

= a²b²c² - 9abc + 14

Hence,

(abc - 2)(abc - 7) = a²b²c² - 9abc + 14

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