Question

9ysquare-100=0 solve by factorisation method​

Answer 1

Step-by-step explanation:

9y² - 100 = 0

9y² = 100

y² = 100/9

y = √100/9

y = 10/3

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Answer 2

Answer:

$9 {y}^{2} - 100 = 0 \\ {(3y)}^{2} - {(10)}^{2} = 0 \\ (3y + 10)(3y - 10) = 0 \\ 3y + 10 = 0 \: or \: 3y - 10 = 0 \\ 3y = - 10 \: or \: 3y = 10 \\ y = - \frac{10}{3} \: or \: y = \frac{10}{3} \\ \: hence \: \\ y = - \frac{10}{3} \: or \: \frac{10}{3}$