Question

Solve for y:

${y}^{2} - 9 = 0$
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Answer 1

Answer:

${y}^{2} - 9 = 0 \\ \\ \implies \: {y}^{2} - {(3)}^{2} = 0 \\ \\ \implies(y - 3)(y + 3) = 0 \\ \\ \implies \: (y - 3) = 0 \: \: \: \: \: or \: \: \: \: \: (y + 3) = 0 \\ \\ \\ { \huge{ \red{ \boxed{ \therefore \: y = 3}}}} \\ \\ \:or \\ \\ { \huge{ \pink{ \boxed{ \therefore \: y = - 3}}}}$

Answer 2

$\huge{\tt{\red{}\green{A}\purple{N}\pink{S}\blue{W}\orange{E}\red{R}}}☘$

$y {}^{2} - 9 = 0 \\ {y}^{2} = 9 \\ y = √9 \\ y = 3$