Question

Gente pfvr me ajudem a resolver essa equação do 2° grau pela fórmula resolutiva!​

Answer 1

• $\boxed{x^{2}+3x-10=0}$

☑️ Coeficientes

• $\small{a=+1}$

• $\small{b=+3}$

• $\small{c=-10}$

☑️ Discriminante

• $\small{\Delta=b^{2}-4.a.c}$

• $\small{\Delta=(3)^{2}-4.(1).(-10)}$

• $\small{\Delta=9+40}$

• $\small{\Delta=49}$

☑️ Raízes da equação

• $\small{x'=\dfrac{[-(+3)+\sqrt{49}]}{2.(1)}}$

• $\small{x'=\dfrac{[-3+7]}{2}}$

• $\small{x'=\dfrac{4}{2}}$

• $\underbrace{\small{x'=+2}}$

================================

• $\small{x"=\dfrac{[-(+3)-\sqrt{49}]}{2.(1)}}$

• $\small{x"=\dfrac{[-3-7]}{2}}$

• $\small{x"=\dfrac{-10}{2}}$

• $\underbrace{\small{x"=-5}}$

☑️ A solução será ={ -5 ; 2}