Question

learning Task 2. Which of the following represent a quadratic function
1. f(x) = 8x + 5
2. f(x) = x2 - 2x + 7​

Answer 1

Answer:

f(x)= X²-2X +7 because a quadratic equation is the polynomial having with a degree of 2 ..

Step-by-step explanation:

i think u get it what i mean........

Answer 2

The function $\bf f(x) = {x}^{2} - 2x + 7$ is a quadratic function.

Given:

• Two functions.
• $f(x) = 8x + 5$ and $f(x) = {x}^{2} - 2x + 7$

To find:

• Which of the above represent a quadratic function.

Solution:

Concept to be used:

• A quadratic function have degree 2.
• Degree is the highest power of variable in which the function is written.

Step 1:

Take first function.

On observing the first functions,$f(x) = 8x + 5$

It is clear that,

It have highest power '1' , i.e. degree of function is 1, so it is linear function.

Step 2:

Take second function.

Observe the second function;

$f(x) = {x}^{2} - 2x + 7$

It have highest power '2' of x.

i.e. degree of function is 2, so it is quadratic function.

Thus,

The function $\bf f(x) = {x}^{2} - 2x + 7$ is a quadratic function.

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