Question

pls solve this question √63-5√28+11√7

Answer 1

Hi,

Your answer is =>

√63 - 5√28 + 11√7

3√7 - 5 × 2√7 + 11√7

3√7 - 10√7 + 11√7

3√7 + √7

4√7

Hoping it helps

☺

Answer 2

$Given : \sqrt{63} - 5 \sqrt{28} + 11 \sqrt{7}$  ------- (1)


Now.

(a)

$\sqrt{63} = \sqrt{3^2 * 7}$

                 $= \sqrt{7} \sqrt{3^2}$

                 $3 \sqrt{7} ------ (2)$



(b)

$5 \sqrt{28} = 5 * \sqrt{2^2 * 7}$

                          $= 5 \sqrt{7} \sqrt{2^2}$

                          $2 * 5 \sqrt{7}$

                          $10 \sqrt{7}$   ----- (3)




Substitute (2),(3) in (1), we get

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

$4 \sqrt{7}$


Hope this helps!