Question

Me ajudaaaaaaaaaaaaaa

Answer 1

$\left(\dfrac{x^{2} }{3}+\dfrac{2x}{5} -\dfrac{1}{4} \right)+\left(\dfrac{2x^{2} }{3} -\dfrac{1}{4} \right)=\\ \\ \\\\\\ \dfrac{x^{2} }{3}+\dfrac{2x}{5} -\dfrac{1}{4} +\dfrac{2x^{2} }{3} -\dfrac{1}{4} =\\ \\ \\\\\\ \dfrac{20x^{2} +24x-15+40x^{2} -15}{60} =\\ \\ \\ \\ \dfrac{60x^{2} +24x-30}{60}=\\ \\ \\\\ \boxed{x^{2} +\dfrac{2x}{5} -\dfrac{1}{2} }$

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