Question

plz answer me these 3 questions plz​

Answer 1

Given :

• (y - x)(y + x) is equal to which of the following ?

1. y² - yx
2. yx - x
3. y² - x²
4. x² - y²

• Which of the following are the factors of the a² + ab + bc + ca

1. (b + c)(c + a)
2. (a + b)(a + c)
3. a(a + b + c)
4. (a + b)(b + c)

• Which of the following is the factorisation of x³ - x?

1. x(x - x²)
2. x[(1 + x)(1 - x)]
3. x(x² - x)
4. x[(x + 1)(x - 1)]

Solution :

Apply identity : a² - b² = (a + b)(a - b)

→ (y - x)(y + x)

→ (y)² - (x)²

→ y² - x²

• Option 3

• a² + ab + bc + ca

→ a² + ab + ca + bc

→ a(a + b) + c(a + b)

→ (a + b)(a + c)

• Option 2

• x³ - x

Take x as a common

→ x(x² - 1)

Apply identity : a² - b² = (a + b)(a - b)

→ x[(x)² - (1)²]

→ x[(x + 1)(x - 1)]

• Option 4

Answer 2

Answer:

7. (y - x)(y + x)

   = y² - xy + xy - x²

   = y² - x²

8. a² + ab + bc + ca

  = (a + b)(a + c)

9. x³ - x

   = x[(x + 1)(x - 1)]

U have blocked me,

only U can unblock me now

If u don't know how to unblock

Watch tutorial on youtube...............

Thanks

Hope this answer helps u...

Step-by-step explanation: