If x is a real number such that x³ = 729, then x² + √x = ?

F.) 9

G.) 27

H.) 30

J) 84

K.) 90

F.) 9

G.) 27

H.) 30

J) 84

K.) 90

x³ = 729

x = 9 {took the cube root of each side}

x² + √x

= 9² + √9 {substituted 9 in for x}

= 81 + 3 {evaluated exponent and radical sign}

= 84 {added}

x = 9 {took the cube root of each side}

x² + √x

= 9² + √9 {substituted 9 in for x}

= 81 + 3 {evaluated exponent and radical sign}

= 84 {added}

**J.) 84**

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