MyQuestionIcon

1

You visited us 1 times! Enjoying our articles? Unlock Full Access!

Algebraic Identities

If x=2, fin...

Question

If $x = 2$ , find the value of
$x - x^{2} + 7$

Open in App

Solution

Let us substitute $x = 2$ in the given expression $x - x^{2} + 7$ as shown below:

$x - x^{2} + 7 = 2 - (2)^{2} + 7 = 2 - 4 + 7 = 9 - 4 = 5$

Hence, $x - x^{2} + 7 = 5$ if $x = 2$ .

Suggest Corrections

thumbs-up

0

Similar questions

x^{2} + \frac{1}{x^{2}} = 7

x \neq 0

; find the value of :

7 x^{3} + 8 x - \frac{7}{x^{3}} - \frac{8}{x}

x - \frac{1}{x} = 7

then find the value of

x^{2} + \frac{1}{x^{2}} .

Q. Find value of

12 x^{3} + x^{2} + x

x = 7

3 x + \frac{2}{x} = 7

. Find the value of

(9 x^{2} + \frac{4}{x^{2}})

x = \frac{3 + \sqrt{7}}{2}

, find the value of

4 x^{2} + \frac{1}{x^{2}}

View More

Join BYJU'S Learning Program

similar_icon

Related Videos

lock

Use of Identities

MATHEMATICS

Watch in App

explore_more_icon

Explore more

Algebraic Identities

Standard VIII Mathematics

Join BYJU'S Learning Program

CrossIcon