Question

Please give correct answers.
Don't give irrelevant answers ​

Answer 1

Answer:

4

(4) factorize :

(i) 12x^2-7x+1

=> 12x^2-3x-4x+1=0

=> 3x(4x-1)-1(4x-1)=0

=> (3x-1)(4x-1)=0

=> 3x-1=0 | 4x-1=0

=> 3x = 1 | 4x = 1

=> x=1/2 | x=1/2

(ii)2x^2+7x+3

=>2x^2+6x+1x+3=0

=>2x(x+3)+1(x+3)=0

=> (2x+1)(x+3)=0

=> 2x+1=0 | x+3=0

=> 2x=(-1) | x=(-3)

=> x= (-1/2) | x=(-3)

(iii) 6x^2+5x+6

=>6x^2+9x-4x+6=0

=>3x(2x+3)-2(2x+3)=0

=>(3x-2)(2x+3)=0

=>3x-2=0 | 2x+3=0

=> 3x=2 | 2x=(-3)

=> x=2/3 | x=(-3/2)

(iv) 3x^2-x-4

=>3x^2+3x-4x-4=0

=>3x(x+1)-4(x+1)=0

=>(3x-4)(x+1)=0

=>3x-4=0 | x+1=0

=> 3x=4 | x=(-1)

=> x=4/3 | x= (-1)