Explicación paso a paso:
1)
[tex] {x}^{2} = 49 \\ x = + - 7[/tex]
2)
[tex] {x}^{2} - 36 =0 \\ {x}^{2} = 36 \\ x = + - 6[/tex]
3)
[tex]x = \frac{ - ( - 4) + - \sqrt{ {( - 4)}^{2} - 4 \times 1 \times 3 } }{2 \times 1} \\ x = \frac{4 + - \sqrt{16 - 12} }{2} \\ x = \frac{4 + - \sqrt{4} }{2} \\ \\ x = \frac{4 + 2}{2} = 3 \\ \\ x = \frac{4 - 2}{2} = 1 \\ \\ x = 1 \\ x = 3[/tex]
4)
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Verified answer
Explicación paso a paso:
1)
[tex] {x}^{2} = 49 \\ x = + - 7[/tex]
2)
[tex] {x}^{2} - 36 =0 \\ {x}^{2} = 36 \\ x = + - 6[/tex]
3)
[tex]x = \frac{ - ( - 4) + - \sqrt{ {( - 4)}^{2} - 4 \times 1 \times 3 } }{2 \times 1} \\ x = \frac{4 + - \sqrt{16 - 12} }{2} \\ x = \frac{4 + - \sqrt{4} }{2} \\ \\ x = \frac{4 + 2}{2} = 3 \\ \\ x = \frac{4 - 2}{2} = 1 \\ \\ x = 1 \\ x = 3[/tex]
4)