Question

(2/3a + 1/3b) (2/3a - 1/3b)​

Answer 1

Answer:

identity used:

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

so

(2/3a+1/3b)(2/3a-1/3b)

= (4/9a^2-1/9b^2)

hope it works ❤️❤️

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Answer 2

Answer:

$(a + b)(a - b) = a {}^{2} - b {}^{2} \\ ( \frac{2}{3} a + \frac{1}{3} b)( \frac{2}{3} a - \frac{1}{3}b) \\ ( \frac{2}{3} a) {}^{2} - ( \frac{1}{3} b) {}^{2} \\ \frac{4}{9} a {}^{2} - \frac{1}{9} b {}^{2}$

hope it helps you

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