Question

using identity evaluate: 71^2​

Answer 1

Answer:

I have used this formula

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

71^2 = 5041

Step-by-step explanation:

${71}^{2} \\ = {(70 + 1)}^{2} \\ = {70}^{2} + {1}^{2} + (2 \times 70 \times 1) \\ = 4900 + 1 + 140 \\ \large{ \boxed{= \underline{ \underline{5041}}}}$