化简 (x+2-sqrt(3))(x+2+sqrt(3))

解答

化简

(x + 2 - 3) (x + 2 + 3)

x^{2} + 4 x + 1

求解步骤

(x + 2 - 3) (x + 2 + 3)

打开括号

= xx + x \cdot 2 + x 3 + 2 x + 2 \cdot 2 + 23 - 3 x - 3 \cdot 2 - 33

化简

xx + x \cdot 2 + x 3 + 2 x + 2 \cdot 2 + 23 - 3 x - 3 \cdot 2 - 33 : x^{2} + 4 x + 1

= x^{2} + 4 x + 1

e x p an d (2 - cos (x))^{2}

e x p an d 7 (x)

e x p an d (2 sin (x) - 4)^{2}

e x p an d (4 + x) x^{3} e^{4 x} + 5

e x p an d \frac{( x - 1 ) ( y - 1 ) ( z - 1 )}{( a - 1 ) ( b - 1 )}