Question

correct answer will be marked as brainliest​

Answer 1

Answer: 11) x² - 4x -21

Factorization by splitting the middle term

x² - 7x + 3x - 21

x(x-7) +3(x-7)

= (x-7) (x+3)

12) Coefficient of x in expansion of ( x + 3 )^3 is 27.

Answer 2

Answer:

Step-by-step explanation:

11)  a

12) d