Question

What is the square of 15? Find out without
actual multiplication.​

Answer 1

Answer:

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Step-by-step explanation:

value of (15)^2

            = (10+5)^2

Using identity (a+b)^2 = a^2 + 2ab + b^2

(10+5)^2 = (10)^ + 2(10)(5) + (5)^2

(10+5)^2 = 100 + 100 + 25

(10+5)^2 = 225

∴ (15)^2 = 225