Question

check 3x+7 is solution of 7x3 - 3+7 or not​

Answer 1

Step-by-step explanation:

Apply remainder theorem

7+3x=0

3x=−7 or x=

3

−7

Replace x=

3

−7

in the equation, we get

3x

3

+7x =3(

3

−7

)

3

+7(

3

−7

)

=3(

27

−343

)−

3

49

=

9

343

−

3

49

This value is not equal to zero then 7+3x is not a factor of

3x

3

+7x

Answer 2

Correct Question :-

Prove That —

$\sf{ {7x}^{3} - 3 + 7 = 3x + 7}$

Correct Answer :-

We can prove the equation by using the method below;

$\sf{ {7x}^{3} - 3 + 7 = 3x + 7}$

$\to \sf{ {7x}^{3} - 4 = 3x + 7}$

$ \to \bf{LHS ≠ RHS}$

@MrCyber