Question

(i) 9(x - 2y)2 - 4(x - 2y) - 13​

Answer 1

Step-by-step explanation:

Let (x - 2y) = a

then,

9(x-2y)²-4(x-2y)-13

= 9a² - 4a - 13

by using middle term splitting method

we can split 4a to 13a - 9a

So 9a² - 4a - 13

= 9a² - ( -9a +13a ) - 13

= 9a² + 9a - 13a - 13

= 9a ( a + 1 ) - 13 ( a + 1 )

= ( 9a - 13 ) ( a + 1 )

by putting the value of "a" in it we will get

[9(x-2y)-13] [(x-2y)+1]

ANSWER = (9x - 18y - 13) (x - 2y +1)

@doll54 ❤ ☺

Answer 2

Answer:

The required answer is 14x - 44y - 13.

Step-by-step explanation:

9 (x - 2y) 2 - 4 (x - 2y) - 13

=> (9x - 18y) × 2 - 4x - 8y - 13

=> 18x - 36y - 4x - 8y - 13

=> 18x - 4x - 36y - 8y - 13

=> 14x - 44y - 13