Question

If x cube is equal to 891 and y cube is equal to 1089 then find the value of x y

Answer 1

Step-by-step explanation:

${x}^{3} = 891 \\ x = \sqrt[3]{891} = \sqrt[3]{27 \times 33 } \\ x = 3\sqrt[3]{33} \\ \\ {y}^{3} = 1089 \\ y = \sqrt[3]{1089}$

$xy = 3 \sqrt[3]{33} \times \sqrt[3]{1089} \\ xy = 3 \sqrt[3]{11 \times 3 \times 11 \times 11 \times 3 \times 3 } \\ xy = 3 \times 11 \times 3 = 99$

Hope it helps...

Please mark me as a BRAINLIST ...

Answer 2

Answer:

Step-by-step explanation:

{x}^{3} = 891 \\ x = \sqrt[3]{891} = \sqrt[3]{27 \times 33 } \\ x = 3\sqrt[3]{33} \\ \\ {y}^{3} = 1089 \\ y = \sqrt[3]{1089}

xy = 3 \sqrt[3]{33} \times \sqrt[3]{1089} \\ xy = 3 \sqrt[3]{11 \times 3 \times 11 \times 11 \times 3 \times 3 } \\ xy = 3 \times 11 \times 3 = 99

Hope it helps...

Please mark me as a BRAINLIST