Question

solve by systematic method and verify the solution:
x - 4 = 21​

Answer 1

x - 4 = 21

x = 21 + 4

x = 25 ——> Answer

Verification:

x - 4 = 21

25 - 4 = 21

21 = 21

LHS = RHS

Hence the answer x = 25 is correct.

Answer 2

Given,

Polynomial p(x) => x-4 = 21

Let's find out the zero/solution of the polynomial.

x - 4 = 21

x = 21+4

x = 25

The zero/solution of the polynomial is 25.

Verification :

Substitute the value of x in the given polynomial. If the both L.H.S and R.H.S will be equal,then the value of x is called as zero/solution of the polynomial.

x - 4 = 21

25 - 4 = 21

21 = 21

Here L.H.S = R.H.S

Therefore 25 is the zero of the polynomial.