Question

indentifique os coeficientes das equações abaixo
a) - X^2-X+1=0
b) 2X^2=3
c)5X^2-2=3X

Answer 1

a)-x^2-x+1=0(-1)》x^2+x-1=0》a=1 , b=1 , c=-1》x=-1-,-\/1^2-4(1)(-1) / 2(1)》 x=-1+,-\/1-4(-1) / 2》x=-1+,-\/1+4 / 2》 x=-1+,-\/5 / 2》x=-1+,-2,24 / 2》 x1=-1+2,24/2》x1=1,24/2》x1=0,62. x2=-1-2,24/2》x2=-3,24/2》x2=-1,62 =================================== b)2x^2=3》x^2=3/2》x=\/3/\/2》 x=+,- 1,73/1,41》x=+,- 1,22. ====================================c)5x^2-2=3x》5x^2-3x-2=0》a=5 , b=-3 , c=-2》x=-3+,-\/3^2-4(5)(-2) / 2(5)》 x=-3+,-\/9-20(-2) / 10》 x=-3+,-\/9+40 / 10》x=-3+,-\/49 / 10》 x=-3+,-7 / 10》 x1=-3+7/10》x1=4/10 (÷2)》x1=2/5 x2=-3-7/10》x2=-10/10》x2=-1