Question

Find the value of √63 -√28 + 8√7​

Answer 1

Step-by-step explanation:

$\sqrt{63} - \sqrt{28} + 8 \sqrt{7}$

$= \sqrt{9 \times 7} - \sqrt{4 \times 7} + 8 \sqrt{7}$

$= 3 \sqrt{7} - 2 \sqrt{7} + 8 \sqrt{7}$

$= (3 - 2 + 8) \sqrt{7}$

$= 9 \sqrt{7}$

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