Question

factorise- algebraic expressions​

Answer 1

Answer:

$4a ^{2} - {5b}^{2}$

$(2a) ^{2} - ( \sqrt{5} b)^{2}$

Using { a²-b² = (a+b)(a-b) }

$(2a + \sqrt{5} b)(2a - \sqrt{5} b)$ ......Ans

Hope this helps....

Answer 2

Answer:

${\mathbb{\underline{\highlight{\pink{\fbox{Answer\:Below}}}}}}$

Step-by-step explanation:

$4a </p><p>2</p><p> −5b </p><p>2</p><p> </p><p></p><p>(2a) ^{2} - ( \sqrt{5} b)^{2}(2a) </p><p>2</p><p> −( </p><p>5</p><p> </p><p> b) </p><p>2$

Using ${ a²-b² = (a+b)(a-b) }$

$(2a + \sqrt{5} b)(2a - \sqrt{5} b)(2a+ </p><p>5$

b)(2a−5

) ......Ans