Question

vEvaluate each of the following by using a suitable identity :
1)71²​

Answer 1

Answer:

5041

Step-by-step explanation:

1) (70+1)²=4900+1+2(70)(1)=4901+140=5041

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Answer 2

Answer:

see we can use. the identity

Step-by-step explanation:

we know that

${a}^{2} + 2ab + {c}^{2} = (a + b) {}^{2}$

thus we could write 71 as

(70+1) raised to power 2

thus

70 raised to power 2+2 multiplied 70 raised to power 1+1 raised to power2=

4900+140+1

5041

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