Question

use the identities. 2) (3 + 5)
^2​

Answer 1

Answer:

We need to expand (2a+3b+5)

2

Comparing the given expression with (x+y+z)

2

,

we find that x=2a,y=3b and z=5

Therefore, using Identity V, we have

(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

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(3+5)²

Using identity:-

(a+b)²=a²+2ab+b²

(3+5)²=(3)²+2(3×5)+(5)²

=>9+30+25

=>64

❥Hope it helps you....