Question

factorise : y square- 2y-15

Answer 1

yy-2y-15
=yy-5y+3y-15
=y(y-5)+3(y-5)
=(y-5)(y+3)

Answer 2

Factorisation is defined as the method of writing expressions as two or more terms multiplied together.

$\large\underline\bold{Solution:\longrightarrow}$

y^2 - 2y - 15

After splitting the middle term appropriately,

y^2 - 5y + 3y - 15

Taking out the common factors,

y ( y - 5 ) + 3 ( y - 5 )

Again taking out the common term,

( y - 5 ) ( y + 3 )

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