What is expand (6-sqrt(a+3))(6+sqrt(a-3)) ?

The solution to expand (6-sqrt(a+3))(6+sqrt(a-3)) is 36+6sqrt(a-3)-6sqrt(a+3)-sqrt(a^2-9)

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expand (6-sqrt(a+3))(6+sqrt(a-3))

expand

(6 - a + 3) (6 + a - 3)

36 + 6 a - 3 - 6 a + 3 - a^{2} - 9

Solution steps

(6 - a + 3) (6 + a - 3)

Apply FOIL method

(6 - a + 3) (6 + a - 3) : 36 + 6 a - 3 - 6 a + 3 - a^{2} - 9

= 36 + 6 a - 3 - 6 a + 3 - a^{2} - 9

\frac{1}{( s ^{2} + 1 ) ( s ^{2} + 4 s + 8 )}

6 (\frac{x ^{3}}{3} + 2 x^{2} + 4 x) + C

(sin (\frac{a}{2}) - cos (\frac{a}{2}))^{2}

\frac{5 ( x ^{2} + 4 )}{( x ^{2} - 49 ) ^{9}}

(t - i t^{2})^{2}

What is expand (6-sqrt(a+3))(6+sqrt(a-3)) ?
The solution to expand (6-sqrt(a+3))(6+sqrt(a-3)) is 36+6sqrt(a-3)-6sqrt(a+3)-sqrt(a^2-9)