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√9x² 3x 3x(√x)

√(9x² / x) = - - - - - - = - - - - - = - - - - - - - - - - = 3√x √x √x x

(√13 + 2√2)(√13 - 2√2)

(√13)(√13) - (√13)(2√2) + (2√2)(√13) - (2√2)(2√2)

13 - 2√26 + 2√26 - 8

13 - 8

5

( - 8 + √16) / 2

( - 8 + 4) / 2

( - 4) / 2 - 2

( - 6 - √4) / 6

( - 6 - 2) / 6

( - 8) / 6 - 4 / 3

√x = 4

(√x)² = 4²

x = 16

√y - 2 = 0

√y = 0 + 2

√y = 2

(√y)² = 2²

y = 4

√(y + 1) - 3 = 0

√(y + 1) = 0 + 3

√(y + 1) = 3

(√(y + 1))² = 3²

y + 1 = 9

y = 8

√(x + 1) = x - 5

(√(x + 1))² = (x - 5)²

x + 1 = x² - 10x + 25

11x = x² + 24

11x - x² = 24

x = 3

√(x - 1) - x = - 3

√(x - 1) = - 3 + x

√(x - 1) = x - 3

(√(x - 1))² = (x - 3)²

x - 1 = x² - 6x + 9

7x = x² + 10

7x - x² = 10

x = 2

y - 10 - √5y = 0

y - 10 = 0 + √5y

y - 10 = √5y

(y - 10)² = (√5y)²

y² - 20y + 100 = 5y

100 = 25y - y²

5 = y.