Question

quais as raizes da equação 2×elevado a 2 -14x+20=0​

Answer 1

2x² -14x +20 = 0 ====> :(2)

x² -7x +10 = 0

∆=(-7)² -4.1.10= 9 => √∆=3

x= 7±3/2

x'= 7+3/2 = 5 ✓

x"= 7-3/2 = 2 ✓