展开 3sqrt(2)(4+2sqrt(3))

解答

展开

32 (4 + 23)

122 + 66

十进制

31.66750 \dots

求解步骤

32 (4 + 23)

使用分配律:

a (b + c) = ab + a c

32 (4 + 23) = 32 \cdot 4 + 32 \cdot 23

= 32 \cdot 4 + 32 \cdot 23

32 \cdot 4 + 32 \cdot 23 = 122 + 66

= 122 + 66

e x p an d \frac{x ^{2} - 8 x + 4}{( x - 4 ) ^{2}}

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

e x p an d A (8, 2) B (3, - 4)

e x p an d (- x^{3} + 2 \circ 3 \frac{( x - 2 )}{2}) (x)

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