Question

03. Na equação do segundo grau x2 - 7x + 10 = 0, indique qual o seu conjunto solução. (A) {2, 5} (B) {0, 3} (C) {1, 5} (D) {2, 7}

Answer 1

__________

x² - 7x + 10 = 0

_

[tex]Fórmula :/ de :/Bhaskara

$-b ± √b² - 4ac / 2a$

_

$a = 1$

$b = -7$

$c = +10$

_

$x = -(-7) ± √(-7)² - 4(1)(10)/2(1)$

$x = 7 ± √49 - 40 / 2$

$x = 7 ± √9 / 2$

$x = 7 ± 3 / 2$

$x' = 7 + 3/2 → 10/2 → 5$

$x" = 7 - 3/2 → 4/2 → 2$

$<strong> </strong><strong>S </strong><strong>=</strong><strong> </strong><strong>{</strong><strong> </strong><strong>5</strong><strong> </strong><strong>;</strong><strong> </strong><strong>2</strong><strong> </strong><strong>}</strong><strong> </strong>$

$<strong> </strong><strong>Alternativa</strong><strong> </strong><strong>A </strong>$

__________

• Qualquer dúvida me avise!!

Att: MarcosPCV