IV.- Multiplicación de fracciones


587.		588.

$\frac{b}{3a}\: .\: \frac{2a}{5b^{2}}$		$\frac{3x^{2}y}{4ab^{2}}\: .\: \frac{2ab}{3cy}$


589.		590.

$\frac{2x}{x-y}\: .\: \frac{x^{2}-y^{2}}{8}$		$\frac{x-y}{5a}\: .\: \frac{3b}{x-y}$


591.		592.

$\frac{a+1}{a-1}\: .\: \frac{1}{a+1}$		$\frac{5a^{2}b^{3}c}{4a^{2}}\: .\: \frac{2a^{3}b}{a^{2}b^{2}d}$


593.		594.

$\frac{ab-b^{2}}{3a}\: .\: \frac{6a}{8b}$		$\frac{a+x}{a^{2}-x^{2}}\: .\: \frac{a-x}{x^{2}-a^{2}}$


595.		596.

$\frac{a-1}{2a+1}\: .\: \frac{1-4a^{2}}{ab-b}$		$\frac{a^{2}-b^{2}}{3c-3d}\: .\: \frac{c-d}{a+b}$


597.		598.

$(x-\frac{y}{3ax})\: .\: 3ax$		$(a+\frac{b^{2}-a^{2}}{a})a$


599.		600.

$(1+\frac{b}{a})\: .\: \frac{a-b}{2b}$		$(\frac{1}{x}+\frac{1}{y})(x+y)$


601.		602.

$(x+\frac{a}{b})(x-\frac{a}{b})$		$\frac{a^{2}b}{c^{2}}\: .\: \frac{2anb}{3b}\: .\: \frac{3a}{2a+b}$

603.

$\frac{x^{2}-4}{a+3}\: .\: \frac{a^{2}+9}{a+2}\: .\: \frac{a}{a-3}$

604.

$\frac{6ab}{3c-d}\: .\: (\frac{c+d}{a}-\frac{d}{3})$

605.

$\frac{a^{2}x^{2}+2abx+b^{2}}{ax-b}\: .\: \frac{a^{2}x^{2}-b^{2}} {ax+b}\: .\: \frac{3}{(ax+b)^{2}}$

606.

$(\frac{1}{1+x^{2}}+\frac{2x^{2}}{1-x^{4}})(\frac{1}{x^{2}}-1)$