Question

1. (i) (y + 9) (y - 9)​

Answer 1

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$Heya \\</p><p>(a + b)(a - b) = {a}^{2} - {b}^{2} \\</p><p>So, \\</p><p>=(y+9) (y-9) \\ = {(y)}^{2} - {(9)}^{2} \\ = {y}^{2} - 81\\</p><p>Hope \: this \: helps \: u \\ </p><p>Follow \: me \\ </p><p>Plz \: mark \: my \: ans. \: as \: brainliest$

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