Question

(7√3 - 3√7)^2
how can I solve it

Answer 1

Answer:

Using formula, (a-b) ^2=a^2+b^2-2ab, we get

(7 root3)^2+(3 root7)^2-2*7 root3*3 root7

=49*3+9*7-2*21* root21

=147+63-42 root21

=210-42 root21

=210-192.36

=17.64

Hope it will help you..

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Answer 2

Step-by-step explanation:

(7√3-3√7)'2

=using the formula (a-b) '2=a'2+b'2-2ab

=then, (7√3)'2+(3√7)'2-(2.7√3.3√7)

=(14.√9)+(9.√14)-(2.14√10)

=(14.3)+(9.7)-28√10

=42+63-28√10

=105-28√10

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