Question

x²+2×-3=0 raizes da equançao do 2° grau​

Answer 1

• $\underbrace{\sf{x^{2}+2x-3=0}}$

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• $\small{a=1}$

• $\small{b=2}$

• $\small{c=-3}$

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• $\small{\Delta=b^{2}-4.a.c}$

• $\small{\Delta=(2)^{2}-4.(1).(-3)}$

• $\small{\Delta=4+12=16}$

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• $\small{x'=\dfrac{[-(2)+√16]}{2.(1)}}$

• $\small{x'=\dfrac{[-2+4]}{2}}$

• $\small{x'=\dfrac{2}{2}}$

• $\small{x'=1}$

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• $\small{x"=\dfrac{[-(2)-√16]}{2.(1)}}$

• $\small{x"=\dfrac{[-2-4]}{2}}$

• $\small{x"=-\dfrac{6}{2}}$

• $\small{x"=-3}$

▶️ As raízes serão: 1 e -3