展开 4xz+xsqrt(x^2+4(7.5-3z)^2)

解答

展开

4 x z + x x^{2} + 4 (7.5 - 3 z)^{2}

4 x z + x x^{2} + 225 - 180 z + 36 z^{2}

求解步骤

4 x z + x x^{2} + 4 (7.5 - 3 z)^{2}

x^{2} + 4 (7.5 - 3 z)^{2} = x^{2} + 225 - 180 z + 36 z^{2}

= 4 x z + x 36 z^{2} - 180 z + x^{2} + 225

e x p an d A (s (s^{2} + 16))

e x p an d \frac{4}{s ( s + 3 )}

e x p an d (f \circ g) (x + 5) (3 x - 4)

\frac{d}{d v} ((p) ((p + \frac{9.5}{v ^{2}}) (v - 9.8)))

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