Question

factorise please help me ​

Answer 1

Solution:

x) 4x²+25y²+20xy-10x-25y

= [(2x)²+(5y)²+2*2x*5x]-5(2x+5y)

= (2x+5y)²-5(2x+5y)

=(2x+5y)[2x+5y-5]

Therefore,

4x²+25y²+20xy-10x-25y

= (2x+5y)(2x+5y-5)

_______________________

xii)(a-1/a)²+6(a-1/a)+9

= (a-1/a)2+2*(a-1/a)*3+3²

= (a-1/a+3)²

=(a-1/a+3)(a-1/a+3)

Therefore,

(a-1/a)²+6(a-1/a)+9

=(a-1/a+3)(a-1/a+3)

••••

Answer 2

Hey!

Refer the below attachment !

Thanks !