Question

find the square of the 42 without actual multiplication ​

Answer 1

Answer:0

Step-by-step explanation:

Answer 2

Answer:

Step-by-step explanation:

We know that,

(a+b)² = a² + 2ab + b²,

Now let a = 40,

and b = 2,

Substituting them in the above formula,

=> (40+2)² = 40² + 2*40*2 + 2²

=> 42² = 1600 + 160 +4

=> 42² = 1764,

Therefore : Square of 42 = 1764,

Proved without Actual multiplication.

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