4x²-x+1=x+3x²3x² +5x = -x -9+2x² me ajudem​

4x²-x+1=x+3x²
4x^2 - 3x^2 - x - x + 1 = 0
x^2 - 2x + 1 = 0
a = 1; b = - 2; c = 1
/= b^2 - 4ac
/= (-2)^2 - 4.1.1
/= 4 - 4
/= 0

X = (- b +/- / /)/2a
/= 0

x = - b / 2a
x = - (-2)/2.1
x = 2/2
x = 1

R.:
S = {1}
__________

3x² +5x = -x -9+2x²
3x^2 - 2x^2 + 5x + x + 9 = 0
x^2 + 6x + 9 = 0
a = 1; b = 6; c = 9
/= b^2 - 4ac
/= 6^2 - 4.1.9
/= 36 - 36
/= 0
X = (- b +/- / /)/2a
/= 0
x = - b/2a = -6/2.1 = -6/2= - 3

R.:
S = {- 3}​