Question

Factorise
5x²- 20xy​

Answer 1

Answer:

We have,

$5 {x}^{2} - 20xy \\ = 5x(x - 4y) \: \: \: answer \\ \: (taking \: 5x \: common)$

Additional information-

Factorisation means to reduce an expression into its factors or exact divisors.

Factorisation can be done in the following ways-

1) By taking common terms.

2)By factorising middle term .

3)By using identities.

Some of the identities used in factorisation are as follows-

${a}^{2} + {b}^{2} + 2ab = {(a + b)}^{2} \\ {a}^{2} + {b}^{2} - 2ab = {(a - b)}^{2} \\ {( {a}^{2} - {b}^{2} )} = (a + b)(a - b)$