Question

expressão 5x² - 7x- 11= 0

Answer 1

Δ = b² -4ac
Δ = (-7)² -4 *5 * (-11)
Δ = 49 + 220
Δ = 269

Answer 2

$5x^{2} -7x-11=0= \Delta= b^{2} -4.a.c= \Delta= -7^{2} -4.5.(-11)= \Delta=49+220=269 x^{1} =-(-7)-+ \sqrt{269} /2.5=7 \sqrt{269} /10  x^{2} =-(-7)-+ \sqrt{269}/2.5=7 \sqrt{269} /10$