Question

factorise the following 3 x square - 13 X + 12​

Answer 1

Answer:6x³-5x²-13x+12

Let x=1

6-5-13+12

1-1=0

Hence x-1 is the factor of p(x)

Now. x-1 )6x³-5x²-13x+12( 6x². +x-12

6x³-6x²

- +

x²-13x

x²-1x

- +

-12x+12

-12x+12

+ -

0

(x-1)(6x²+x-12)

(x-1)(6x²+9x-8x-12)

(x-1)[3x(2x+3)-4(2x+3)]

(x-1)(2x+3)(3x-4)

Step-by-step explanation:

Answer 2

Step-by-step explanation:

3x^2+13x+12

3x^2+9x+4x+12

3x(x+3)+4(x+3)

(3x+4)(x+3)

3x+4=0

3x=-4

x=-4/3

x=-3