Question

if a=2 b=1 then (a² +b² +2ab) =____​

Answer 1

Answer:

answer is 9

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Answer 2

♡ Answer:

• 9

♡ Solution:

$\because$ We know that:

• (a² + 2ab + b²) = (a + b)²

So,

(a² + b² + 2ab)

= (a + b)²

= (2 + 1)²

($\because$ We know that, a = 2 and b = 1)

= (3)²

= 3 × 3

= $\boxed{\sf 9}$

♡ Concepts Used :

• (a + b)² = a² + 2ab + b²

• Substitution of values

• Addition of Number

• Squaring of number