Solving by factoring
Quadratic formula
Solving by taking square roots
100
Solve this quadratics by factoring.
x2 + 2x-3 = 0
x2 + 2x - 3 = 0
= (x-1)(x+3) = 0
x = 1 or x = 3
100
How many solutions do you have if the discriminate is:
a) positive
b)negative
c)zero
a) 2
b) no solution
c) 1
100
Solve this equation by taking square roots.
x2 + 1 = 26
x2 = 25
x= 5, -5
200
Solve this quadratic equation by factoring.
X2 -10x = -16
x2 - 10x + 16 =0
(x-2)(x-8)
x = 2 or x = 8
200
Find the discriminate and number of solutions:
x2-4x-15
a. 76
2 solutions
200
Solve this equation by taking the square root.
4x2-2 = 110
2sqr7
-2sqr7
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
300
Solve x2 - 8x + 14 = 0 using the quadratic formula.
x = -(-8) ±√ (-8)2 - 4(1)(14) / 2(1)
= 8 ±√ 8 / 2
= 5.41 and 2.59
300
Solve this equation by taking square roots.
(x-4)2 - 16 = 0
(x-4)2 = 16
x- 4 =± 4
x = 0 or 8
400
4x2 - 12x = 0
4x (x - 3) =0
4x = 0 x-3 = 0
x = 0 x = 3
400
Solve x2 + 4x - 21 = 0 by using quadratic formula.
x = 3 or -7
400
Solve this equation by taking square roots.
(x+7)2 - 11 = 0
(x+7)2 = 11
x + 7 = ±√11
x = -3.68 and -10.32
500
5x2 + 3 = 16x
x = 1/5 and x =3
500
Solve -2x2 + 7x + 6=0 by using quadratic formula.
x = -(-7) ±√(-7)2 -4(2)(-6) / 2(2)
x = (7 ±√ 97) / 4
x =4.21 and -.71
500
3(x+2)2 - 4 = 23
x = 1, -5