Question

resolva , em R, as igualdades


a) 2x² - 5x -3=0

b) x²- 10x + 25=0

c) 3x²+ 2x + 1=0

Answer 1

• Delta=b^2-4.a.c

Delta=(-5)^2-4.2.(-3)

Delta=25+24Delta=49

1. X1=-(-5)+7/2.2 X2=5-7/4

X1=5+7/4. X2=-2/4=-1/2X1=12/4=3