Question

factorise 4a square-25​

Answer 1

4a² - 25

( 2a )² - ( 5 ) ²

using a² - b² =( a+ b) ( a - b )


(2a + 5) ( 2a - 5 ) Ans.

Answer 2

$\huge{\texttt{Answer \ :-}}$

=> ${4a}^{2}$ - 25

=> ${(2a)}^{2}$ - ${(5)}^{2}$

[Identity :- ${x}^{2}$ - ${y}^{2}$ = (x + y) (x - y)]

=> (2a + 5) (2a - 5)