Quadratics

Solving by factoring

100

Solve this quadratics by factoring.

x² + 2x = 3

x² + 2x - 3 = 0

     = (x-1)(x+3) = 0

     x = 1 or x = -3

200

Solve this quadratic equation by factoring.

X² + 16 = 10x

x² - 10x + 16 =0

       (x-2)(x-8)

               x = 2 or x = 8

300

Solve this quadratics equation by factoring.

18x² - 3x = 6

18x² - 3x -6 = 0

       =  3(6x² - x - 2) = 0

       =  3(3x -2)(2x +1)= 0

       =  3x -2 = 0   2x + 1 = 0

        x = 2/3 or x -1/2

400

Solve this quadratics equation by factoring.

6x² - x - 2 = 0

6x² - x - 2 = 0

(3x- 2)(2x + 1)

x = 2/3 and -1/2

Solving by taking difference of perfect squares

100

Solve this equation by taking square roots.

x² - 81 = 0

x = 9 and -9

200

Solve this equation by taking square roots.

x² -121 = 0

x = 11 and -11

300

Solve this equation by taking square roots.

x² + 1 = 26

x² = 25

x= 5, -5

400

Solve this equation by taking square roots.

(x-4)² - 16 = 0

(x-4)² = 16

x- 4 =±  4 

x = 0 or 8

Solve by any method

100

v² +2v-8=0

{2,-4}

200

2n²-n-4=2

{3/2 ,1}

300

x²+2x-24=0

{4,-6}

400

x²-11x+19=-5

{3,8}