Question

correct answer will be Marked as the BRAINLIEST ​

Answer 1

Answer:

Step-by-step explanation: let (a+b) be x

12x^2 - x -35 = 0

12x^2 - 21x + 20x -35 = 0

3x (4x - 7) + 5 (4x -7) = 0

(3x + 5 ) ( 4x -7 ) = 0

x = 7/4 or x = -5/3

(a + b) = 7/4

(a + b) = -5/3

Answer 2

Answer:

(3a+3b+5) (4a+4b-7)

Step-by-step explanation:

Let (a+b) be x .

then , 12(x)²-x-35

=12x²- x-35

=12x²- 21x + 20x-35

=3x(4x-7) +5(4x-7)

=(3x+5) (4x-7)

now, put the value of x=a+b

=(3a+3b+5) (4a+4b-7)