展开 ((k_{2}y+h_{2}x+1)^2)/(k_{2)+h_{2}}

解答

展开

\frac{( k _{2} y + h _{2} x + 1 ) ^{2}}{k _{2} + h _{2}}

\frac{k _{2}^{2} y ^{2} + 2 k _{2} y + 2 k _{2} h _{2} y x + h _{2}^{2} x ^{2} + 2 h _{2} x + 1}{k _{2} + h _{2}}

求解步骤

\frac{( k _{2} y + h _{2} x + 1 ) ^{2}}{k _{2} + h _{2}}

(k_{2} y + h_{2} x + 1)^{2} = k_{2}^{2} y^{2} + 2 k_{2} y + 2 k_{2} h_{2} y x + h_{2}^{2} x^{2} + 2 h_{2} x + 1

= \frac{k _{2}^{2} y ^{2} + 2 k _{2} y + 2 k _{2} h _{2} y x + h _{2}^{2} x ^{2} + 2 h _{2} x + 1}{k _{2} + h _{2}}

e x p an d (3, 1, 0) \cdot (5 - x, 3 x - 1, 7)

e x p an d \frac{( 3 x + 1 ) ^{3}}{9}

e x p an d 2 (\frac{5}{4}) (- s)

e x p an d \frac{\frac{3}{4} ( 2 t sin ( 2 t ) + cos ( 2 t ) ) + C}{t}

s im pl i f y 3 (2 - 2)