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Here,
We factorise 2x + 4 to get 2 (x + 2)
In this chapter, we will learn how to factorise by different methods
 Factorisation by common factor
 Factorisation by regrouping
 Factorisation by using identities
 Factorisation by splitting the middle term
Factorization of Algebraic Expression
Algebraic expressions have numbers & variable in it
Example :
 5xy
 28 x ^{ 2 } yz
 41x

98y
^{
2
}
z
^{
4
}
Let’s learn how to factorise it
Factorisation of 5xy
5xy = 5 × x × y
Factorisation of 28x ^{ 2 } yz
28x ^{ 2 } yz = 2 × 2 × 7 × x ^{ 2 } × y × z
= 2 × 2 × 7 × x × x × y × z
Factorisation of 41x
41x = 41 × x
Factorisation of 98y ^{ 2 } z ^{ 4 }
98y ^{ 2 } z ^{ 4 } = 2 × 7 × 7 × y ^{ 2 } × z ^{ 4 }
= 2 × 7 × 7 × y × y × z × z × z × z