Matemática, perguntado por lola8427, 7 meses atrás

Como faço isso sem a fórmula de Baskara? Urgente!

Anexos:

Soluções para a tarefa

Respondido por gabrielhiroshi01
1

Explicação passo-a-passo:

a)

x^{2} =81\\\\x=\pm\sqrt{81}\\\\x=\pm9\\\\\boxed{\boxed{S=\{-9,9\}}}

b)

x^{2} =225\\\\x=\pm\sqrt{225}\\\\x=\pm15\\\\\boxed{\boxed{S=\{-15,15\}}}

c)

2x^{2} =98\\\\x^{2} =\dfrac{98}{2} \\\\x^{2} =49\\\\x=\pm\sqrt{49}\\\\x=\pm7\\\\\boxed{\boxed{S=\{-7,7\}}}

d)

3x^{2} =48\\\\x^{2} =\dfrac{48}{3} \\\\x^{2}=16\\\\x=\pm\sqrt{16}\\\\x=\pm4\\\\\boxed{\boxed{S=\{-4,4\}}}

e)

6x^{2} -24=0\\\\6x^{2} =24\\\\x^{2} =\dfrac{24}{6}\\\\x^{2} =4\\\\x=\pm\sqrt{4}\\\\x=\pm2\\\\\boxed{\boxed{S=\{-2,2\}}}

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