Question

iv : v; nd vi
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Answer 1

Answer:

iv) $\frac{b}{9}^{n} }$

v) True

vi) 87^2 = 7569

    86^2 = 7396

    87^2 - 86^2 = 7569 - 7396 = 173

Step-by-step explanation:

Answer 2

vi)

${a}^{2} - {b}^{2} = (a - b) {}^{2} \\ {87}^{2} - 86 {}^{2} = (87 - 86) {}^{2} \\ = {1}^{2} = 1$