Question

expand using identify and evaluate:(52)³​

Answer 1

Answer:

(x+y+z)

2

=x

2

+y

2

+z

2

+2xy+2yz+2zx,

On comparing (x+y+z)

2

with (2a+3b+5)

2

,

x=2a,y=3b and z=5

Now, by using above identity,

(2a+3b+5)

2

=(2a)

2

+(3b)

2

+(5)

2

+2(2a)(3b)+2(3b)(5)+2(5)(2a)

=4a

2

+9b

2

+25+12ab+30b+20a

Answer 2

Step-by-step explanation:

(50+2)³= 50³ + 2³+ 3 x 50 x 2(50 +2)

= 125000 + 8 + 300(52)

= 125000 + 8 + 15600

= 140608