Question

resolva as inequaçoes de 2ºgrau abaixo:

x²-7x+10<0

Answer 1

x² - 7x + 10 < 0

x = -b +/- √b² - 4*a*c / 2 * a
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
x' = 10 / 2
x' = 5
x" = 7-3 / 2
x" = 4 / 2
x" = 2

S={4<x>2}