Question

The value of the polynomial when x²+2x+5 when x=a is​

Answer 1

Step-by-step explanation:

Let f(x)=x^2+2x+5

When x=a,

f(a)=a^2+2(a)+5

=a^2+2a+5

^ is square

Answer 2

Given data: The expression $x$²+2$x$+5.

To Find: The value of the polynomial for the expression $x$²+2$x$+5, when $x$=$a$.

Solution:

• The expression that consists of two or more terms are called polynomial and it can be added, subtracted and multiplied.
• Polynomial has constants, variable and exponents.
• $f$($x$) can be denoted as polynomial.
• Consider the given expression as, $f$($x$)=$x$²+2$x$+5
• Substitute $x$=$a$ in the expression.
• $f$($a$)=($a$)²+2($a$)+5
• $f$($a$)=$a$²+2$a$+5
• Therefore, the required value of the polynomial $x$²+2$x$+5 when $x$=$a$ is $a$²+2$a$+5.