展开 (sqrt(3)+sqrt(5))(3+sqrt(2))

解答

展开

(3 + 5) (3 + 2)

33 + 6 + 35 + 10

十进制

17.51612 \dots

求解步骤

(3 + 5) (3 + 2)

Apply FOIL method

(3 + 5) (3 + 2) : 33 + 6 + 35 + 10

= 33 + 6 + 35 + 10

e x p an d \frac{9}{( 1 - x ) ( 1 + 2 x ) ^{2}}

e x p an d \frac{1}{2 ( n ^{2} - n )}

e x p an d cos (x) d y - (2 y sin (x) - 3) d x

e x p an d \frac{3 s + 5}{( s + 1 ) ( s ^{2} + 3 s + 2 )}

e x p an d \frac{x ^{4} - 3 x ^{2}}{( x ^{2} - 1 ) ^{2}}