Question

A) x² +25 = 0
B) 2x² - 8 = 0
C) 3x² - 75 = 0
D) x² + 5 = 0
E) x² + 2 = -8
F) x² - 25 = 75
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Answer 1

$a) {x}^{2} + 25 = 0 \\ {x}^{2} = 25 \\ x = \sqrt{25} \\ x = 5 \\ \\ b)2 {x}^{2} - 8 = 0 \\ 2 {x}^{2} = 8 \\ {x}^{2} = \frac{8}{2} = 4 \\ x = \sqrt{4 } \\ x = 2 \\ \\ </p><p>C) 3x² - 75 = 0 \\ 3 {x}^{2} = 75 \\ {x}^{2} = \frac{75}{3} = 25 \\ x = \sqrt{25} \\ x = 5 \\ \\ </p><p>D) x² + 5 = 0 \\ {x}^{2} = 5 \\ x = \sqrt{5} \\ x = 2.23 \\ \\ </p><p>E) x² + 2 = -8 \\ {x}^{2} = - 8 - 2 \\ {x}^{2} = - 10 \\ x = \sqrt{ - 10} .( - 1) \\ x = \sqrt{10} \\ x = 3.16 \\ \\ </p><p>F) x² - 25 = 75 \\ {x}^{2} = 75 + 25 \\ {x}^{2} = 100 \\ x = \sqrt{100 } \\ x = 10$

Answer 2

Essas são as contas gente