Question

45x²+45=405 qual é o resultado

Answer 1

$<var>45x^{2} + 45 = 405</var>$

 

$<var>45x^{2} = 405 - 45</var>$

 

$<var>45x^{2} = 360</var>$

 

$<var>x^{2} = \frac{360}{45}</var>$

 

$<var>x^{2} = 8</var>$

 

$<var>x = \sqrt{8}</var>$

 

Fatorando:

8 | 2

4 | 2

2 | 2

1

 

$<var>\sqrt{8} = \sqrt{2^{2}*2} = 2\sqrt{2}</var>$

 

$<var>S = \begin{Bmatrix}2\sqrt{2}, -2\sqrt{2}\end{Bmatrix} </var>$