Question

Inequação do 2 grau
X²-7x ≤ 2x-14

Answer 1

o que você quer descobrir?

Answer 2

$x^{2} -7x \leq 2x-14 \\ \\ x^{2} -7x-2x+14 \leq 0 \\ \\ x^{2} -9x+14 \leq 0 \\ \\ \Delta=(-9)^2-4(1)(14) \\ \Delta=81-56 \\ \Delta=25 \\ \\ x= \frac{-b\pm \sqrt{\Delta} }{2a} = \frac{9\pm5}{2} \\ \\ x'= \frac{9-5}{2} = \frac{4}{2} =2 \\ \\ x"= \frac{9+5}{2} = \frac{14}{2} =7 \\ \\ \\ ++++\bullet^2----\bullet^7+++ \\ ~~~~m/a~~~~~~~~~~c/a~~~~~~~~~~m/a \\ \\ \\ como~~pediu~~ \leq 0 \\ \\ S=\{x\in R/2 \leq x \leq 7\}$