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b c e g are all correct

Step-by-step explanation:

b. √(50x²) = √(50) * √x² = √(25) * √x² * √(2) = 5*x*√2

c. √(32x) = √(16 *2x) = √16 *√(2x) =4*√(2x)

d. √(18n) = √(9*2n) = √9*√(2n) = 3*√(2n)

g. √(72x²) = √(36 * 2 * x²) = √36 *√x² * √2 = 6x*√2

option 3 . (5x + 1) - (-10x + 6)

step-by-step explanation:

option 1 :

(4x + 3) + (-9x + 4)

or 4x+3 -9x + 4

or -5x + 7

option 2

(x - 2) - (6x - 9)

or x-2-6x + 9

or -5x + 7

option 3

(5x+ + 6)

or 5x + 1 + 10x -6

or 15x -5

option 4

-4x+2x+7-3x

-7x + 2x + 7

-5x + 7

hence only option 3 did   not satisfy the given simplify expression.