x² - 7x + 10 = o sabe monta essa Conta ?
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Temos de resolvê-la por Bhaskara'
![$$
x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}.
$$
<br />$$
x=\frac{-(-7)\pm\sqrt{7^2-4*1*10}}{2*1}.
$$<br />$$
x=\frac{7\pm\sqrt{49-40}}{2}.
$$<br />$$
x=\frac{7\pm\sqrt{9}}{2}.
$$<br />x= 7\pm \frac{3}{2}<br />x'= 5<br />x"= 2<br />S: [2,5]
$$
x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}.
$$
<br />$$
x=\frac{-(-7)\pm\sqrt{7^2-4*1*10}}{2*1}.
$$<br />$$
x=\frac{7\pm\sqrt{49-40}}{2}.
$$<br />$$
x=\frac{7\pm\sqrt{9}}{2}.
$$<br />x= 7\pm \frac{3}{2}<br />x'= 5<br />x"= 2<br />S: [2,5]](https://tex.z-dn.net/?f=%24%24%0Ax%3D%5Cfrac%7B-b%5Cpm%5Csqrt%7Bb%5E2-4ac%7D%7D%7B2a%7D.%0A%24%24%0A%3Cbr+%2F%3E%24%24%0Ax%3D%5Cfrac%7B-%28-7%29%5Cpm%5Csqrt%7B7%5E2-4%2A1%2A10%7D%7D%7B2%2A1%7D.%0A%24%24%3Cbr+%2F%3E%24%24%0Ax%3D%5Cfrac%7B7%5Cpm%5Csqrt%7B49-40%7D%7D%7B2%7D.%0A%24%24%3Cbr+%2F%3E%24%24%0Ax%3D%5Cfrac%7B7%5Cpm%5Csqrt%7B9%7D%7D%7B2%7D.%0A%24%24%3Cbr+%2F%3Ex%3D++7%5Cpm+%5Cfrac%7B3%7D%7B2%7D%3Cbr+%2F%3Ex%27%3D+5%3Cbr+%2F%3Ex%22%3D+2%3Cbr+%2F%3ES%3A+%5B2%2C5%5D%0A%0A)
Espero ter ajudado ^^ '
Espero ter ajudado ^^ '
jakcgatasolsa:
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