By applying Remainder Theorem, let us calculate and write the remainders, that I shall get when the following polynomials are divided by (x – 1).
x3 – 3x2 + 4x + 50
Remainder theorem says that,
f(x) is a polynomial of degree n (n ≥ 1) and ‘a’ is any real number. If f(x) is divided by (x – a), then the remainder will be f(a).
Let us solve the following questions on the basis of this remainder theorem.
Let f(x) = x3 – 3x2 + 4x + 50 …(1)
When x3 – 3x2 + 4x + 50 is divided by (x – 1).
Now, let’s find out the zero of the linear polynomial, (x – 1).
To find zero,
x – 1 = 0
⇒ x = 1
This means that by remainder theorem, when x3 – 3x2 + 4x + 50 is divided by (x – 1), the remainder comes out to be f(1).
From equation (1), remainder can be calculated as,
Remainder = f(1)
⇒ Remainder = (1)3 – 3(1)2 + 4(1) + 50
⇒ Remainder = 1 – 3 + 4 + 50
⇒ Remainder = 1 + 1 + 50
⇒ Remainder = 52
∴ the required remainder = 52