Using the formula (a + b)2 = (a2 + 2ab + b2), evaluate (630)2. – InterviewSolution

1.

Using the formula (a + b)2 = (a2 + 2ab + b2), evaluate (630)2.

Answer»

Given (630)²

We have (a + b)²= (a²+ 2ab + b²)(630)²can be written as 600+30 So here a=300 and b=10

Using the formula,

(600 + 30)²= (600²+ 2 X 600 X 30 + 30²)

On simplifying we get,

(600 + 30)²= (360000 + 3600 +900)

(630)²= 396900

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