Question

factorise
1] 3xsquare-x-y

Answer 1

Answer:

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Answer 2

Solutions :-

In the given polynomial 

3x2−x−4,

The first term is 3x2 and its coefficient is 3.

The middle term is −x and its coefficient is −1.

The last term is a constant term −4.

Multiply the coefficient of the first term by the constant 

3×−4=−12.

3×−4=−12.We now find the factor of −12 whose sum equals the coefficient of the middle term, which is −1 and then factorize the polynomial 3x2−x−4 as shown below:

 

 3x2−x−4=3x2+3x−4x−4=3x(x+1)−4(x+1)=(3x−4)(x+1)

Hence, 

3x2−x−4=(3x−4)(x+1).