Question

if you answer this question correctly god will make your day better plz help...​

Answer 1

Answer:

look I have sent the photo

Step-by-step explanation:

look factorize 63 and 28 as 9 × 7 and 4 × 7 now as you know √ab = √a.√b and further solve...

Answer 2

Answer:

$4 \sqrt{7}$

Step-by-step explanation:

We have,

${63}^{1/2} - 5 \times {(28)}^{1/2} + 11 \times {(7)}^{1/2}$

$= \sqrt{63} - 5 \sqrt{28} + 11 \sqrt{7}$

$= \sqrt{9 \times 7} - 5 \sqrt{4 \times 7} + 11 \sqrt{7}$

$= \sqrt{3 \times 3 \times 7} - 5 \sqrt{2 \times 2 \times 7} + 11 \sqrt{7}$

$= \sqrt{ {(3)}^{2} \times 7} - 5 \sqrt{ {(2)}^{2} \times 7} + 11 \sqrt{7}$

$= 3 \sqrt{7} - (5)2 \sqrt{7} + 11 \sqrt{7}$

$= 3 \sqrt{7} - 10 \sqrt{7} + 11 \sqrt{7}$

$= (3 - 10 + 11) \sqrt{7}$

$= (14 - 10) \sqrt{7}$

$= (4) \sqrt{7}$

$= 4 \sqrt{7}$

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hope... it helps you

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mark this answer as BRAINLIEST.