which value is needed in the expression below to create a perfect square trinomial?
x2+8x+
4
8
16
64

16

Step-by-step explanation:

i know because i did the test

The value which is needed to be added to transform the quadratic expression as a perfect square trinomial is 16.

Step-by-step explanation:

A quadratic expression is an expression in which the highest power of the variable is 2 or it can be said that the degree of the expression is 2.  

The identity for is given as follows:  

Step 1:  

Break down the given polynomial .

Step 2:  

Now compare the polynomial with the above indentity.  

On comparing it is observed that the value of a is x and the value of b is 4.  

Step 3:  

In order to make the polynomial a perfect square, add to the broked down polynomial because on comparing the above polynomials the value of b is 4 and the square of 4 is 16.  

Step 4:  

Now as per the identity the polynomial is written as follows:  

.  

Therefore, the perfect square for the given polynomial is which is created by adding 16 to the given expression.  

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Answer details  

Grade: Middle school  

Subject: Mathematics  

Chapter: Quadratic expression  

Keywords: Quadratic, quadratic expression, polynomial, quadratic polynomial, perfect square, trinomial, degree, highest power, transform, identities, break down, perfect square, middle term split, x^2+8x,methamatics, algebra.

b

step-by-step explanation:

the word superfluous means unnecessary