Question

expand
$43 {}^{2}$
using formula and find the value using formula and find the value​

Answer 1

Answer:

${43}^{2} = {(40 + 3)}^{2} \\ = {40}^{2} + {3}^{2} + 2 \times 40 \times 3 \\ = 1600 + 9 + 240 = 1849$

Answer 2

Answer:

${43}^{2} = ( {40 + 3)}^{2} \\ \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: = ( {a + b)}^{2} = {a}^{2} + {b}^{2} + 2ab \\ = {40}^{2}+{3}^{2}+240 \\ = 1600 + 9 + 240 \\ =1 849$

Step-by-step explanation:

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