Question

Сократите дробь,см фото

Answer 1

$\displaystyle\bf\\1)\\\\\frac{14a^{4} b}{49a^{3} b^{2} } =\frac{7a^{3} b\cdot2a}{7a^{3} b\cdot 7b} =\frac{2a}{7b} \\\\2)\\\\\frac{3x}{x^{2} +4x} =\frac{3x}{x\cdot(x+4)} =\frac{3}{x+4}\\\\3)\\\\\frac{x^{2} -c^{2} }{2x-2c} =\frac{(x-c)\cdot(x+c)}{2\cdot(x-c)} =\frac{x+c}{2}$