CameraIcon

SearchIcon

MyQuestionIcon

1

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

Factorisation Using Algebraic Identities

vi Factorise ...

Question

Question 91 (vi)

Factorise the following:

$y^{2} - 2 y - 15$

Open in App

Solution

We have, $y^{2} - 2 y - 15$
$= y^{2} + (3 - 5) y - 15 = y^{2} + 3 y - 5 y - 15 = y (y + 3) - 5 (y + 3) = (y + 3) (y - 5)$

Suggest Corrections

thumbs-up

19

Similar questions

Question 91 (iii)

Factorise the following:

$y^{2} + 18 y + 65$

Q. Question 91 (xi)

Factorise the following:

y^{2} + 7 y + 12

Q. Question 91 (v)

Factorise the following:

y^{2} + 4 y - 21

Q. Question 88 (vi)

Factorise the following expression.

x^{3} y^{2} + x^{2} y^{3} - x y^{4} + x y

Question 92 (vi)

Factorise the following using the identity $a^{2} - b^{2} = (a + b) (a - b) .$

$9 x^{2} - 1$

View More

Join BYJU'S Learning Program

explore_more_icon

Explore more

Factorisation Using Algebraic Identities

Standard VIII Mathematics

Join BYJU'S Learning Program

CrossIcon