Question

me ajudemmmmm matematicaaaaa

Answer 1

x² - 2x =0

x(x -2) = 0

x=0

x - 2 = 0

x = 2

S={0; 2}

3x² - x =0

x(3x -1) = 0

x =0

3x -1 =0

x = 1/3

S={0; 1/3}

2x² - x =0

x(2x - 1) =0

x =0

2x -1 = 0

x = 1/2 = 0,5

S={0; 1/2}

(7/3)x² - x² + (1/2)x = 0

4x²/3 + x/2 = 0

0,75x² + 0,5x = 0

0,25x(3x + 2) = 0

x = 0/0,25

x=0

3x + 2 = 0

x = -2/3

S = {0; -2/3}

3x² + 21 = 0

3x(x + 7) =0

3x = 0

x = 0

x + 7 = 0

x = -7

S={0, -7}

x² - 4 = 0

(x + 2) . (x - 2)= 0

x + 2 = 0

x = -2

x -2 = 0

x = 2

S={-2, 2}

9x² - 16 = 0

(3x - 4) . (3x + 4) = 0

x = -4/3

x = 4/3

S={-4/3, 4/3}

x² - 1 =0

(x - 1) . (x+1) =0

x = 1

x =-1

S={1,-1}

x² -2 = 0

(x - √2) . (x + √2) = 0

x =+√2

x=-√2

S={√2 ; -√2}