Question

Resolva as equações
A)x²=49
B)x²-289 = 0
C)47 + 6x²= 101
D) x² + 64 =0
E)2x² + 25= 25
F)3x² + 68 =20

Answer 1

Resposta:

\begin{gathered}a) {x}^{2} = 49 \\ x = \sqrt{49} \\ x = 7 \\ \\ b) {x}^{2} -289=0 \\ {x}^{2} = 289 \\ x = \sqrt{289} \\ x = 17 \\ \\ c) 47+6 {x}^{2} -101 \\ 6 {x}^{2} = 101 - 47 \\ 6 {x}^{2} = 54 \\ {x}^{2} = \frac{54}{6} = 9 \\ x = \sqrt{9} \\ x = 3 \\ \\ < /p > < p > d) {x}^{2} +64=0 \\ {x}^{2} = 64 \\ x = \sqrt{64} \\ x = 8\end{gathered}a)x2=49x=49x=7b)x2−289=0x2=289x=289x=17c)47+6x2−1016x2=101−476x2=54x2=654=9x=9x=3</p><p>d)x2+64=0x2=64x=64x=8