Question

how to factorise x^2+x-7z​

Answer 1

it can't be factorized

Step-by-step explanation:

I think the question is wrong

Answer 2

Answer:

3x−4y+7z=0.....(i)

2x−y−2z=0......(ii)

3x

3

−y

3

−z

3

=8....(iii)

Applying cross multiplication on (i) and (ii)

8+7

x

=

−6−14

−y

=

−3+8

z

15

x

=

20

y

=

5

z

3

x

=

4

y

=z=k

⇒x=3k,y=4k,z=k

Substituting x,y and z in (iii)

⇒x=3k,y=4k,z=k

3(3k)

3

−(4k)

3

+(k)

3

=8

k

3

=1

k=1

⇒x=3,y=4,z=1