Question

Factorise 9a + 18b - 5a² - 10ab​

Answer 1

SOLUTION

TO DETERMINE

Factorise 9a + 18b - 5a² - 10ab

EVALUATION

Here the given expression is

$\sf \: 9a + 18b - 5 {a}^{2} - 10ab$

We factorise it as below

$\sf \: 9a + 18b - 5 {a}^{2} - 10ab$

$\sf \: =9(a + 2b) - 5 a(a + 2b)$

$\sf \: =(a + 2b)(9 - 5 a)$

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