Question

Square of 135 without actual multiplication.

Answer 1

(135)²

= (130+5)²

= (130)²+2.130.5+(5)²

= 16900+1300+25

= 18225

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Answer 2

Answer:

135 can be written as:

(100 + 35)

⇒ (100 + 35)²

Acc to identity:

(a+b)² = a² + 2ab + b²

a = 100

b = 35

⇒ (100)² + 2(100)(35) + (35)²

= 10000 + 7000 + 1225

= 17000 + 1225

= 18225 Ans

(135)² = 18225

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