How can we solve this equation:-

3x(7x-4)=(5x-2)(3x+4) 

3x(7x-4) = (5x-2)(3x+4)

Expand the both sides :

3x(7x-4) = 5x(3x+4) - 2 (3x+4)

21x2 - 12x = 15x2+ 20x - 6x -8

(21x2 - 15x2)  + ( -12x-20x+6x) + 8 = 0

6x2 - 26x +8 = 0

Dividing both sides by "2"

3x2 - 13x + 4 = 0

By splitting the middle term :

3x2 - 1x-12x + 4 = 0

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

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

x-4 = 0  and 3x-1 = 0

x=4 and x = 1/3

The value of  x = 4 , 1/3

If you are satisfied do give thumbs up.

  • 18

I have also answered your other doubts too , and if you are satisfied with my solution do give thumbs up .

  • -3

3x(7x-4)=(5x-2)(3x+4)

=  21x-12=3x + 7x

=  21x-12=10x

=21x-10x=21

= 11x=21

x= 21/11

  • -7

aneetayadav the solution given by abhi6998 is absolutely wrong and he ans is also incorrect .My solution is correct ,check out my solution . If you satisfied do give thumbs up .

  • -5
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