Question

Choose the correct answer..
Please fast, friends....​

Answer 1

Step-by-step explanation:

1st answer is C

2nd answer is A

3rd answer is B

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Answer 2

Answer:

8)(x-7)(x-7):

=> x² - 7x -7x +49

=>x²-14x + 49

=>c)x² -14x + 49

9)(2x + 5)(2x-5)

=>4x² -10x + 10x - 25

=>4x² - 25

=> a) 4x² - 25

10)x²-y²

=>b)(x+y)(x-y)

Note :

• (a+b)² = a² + 2ab + b²
• (a-b)² = a² - 2ab + b²
• (a+b)(a-b) = a²-b²

These are important identities