Question

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Answer 1

Step-by-step explanation:

Q. 1. Do as directed.

1 Add ab-bc and bc-ca.

Solution :-

ab - bc + bc - ca

→ ab - (-ca) → ab + ca [ - bc + bc = 0 ]

2. Subtract ( 3x² - 2x + 5xy ) from ( 8 - 9xy + 3x² - 5x)

Solution :-

8 - 9xy + 3x² - 5x - 3x² - 2x + 5xy

→ 8 - (9xy + 5xy) + (3x² - 3x²) - (5x - 2x)

→ 8 - 14xy + 3x [3x² - 3x² = 0 ]

Q. 2. Multiply the following using appreciate identities :

3. (x + 7) (3x + 1)

Solution:-

(x + 7) (3x + 1)

→ x + 21x + 7

→ 22x + 7

4. (3x + 1) (3x - 1)

Solution :-

(3x + 1 ) ( 3x - 1)

→ 3x + 3x - 1

→ 6x - 1

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Answer 2

Answer:

➡️ See all the attachments.

hope it will help you.