Solve by factorising first
Use the Null Factor Law to solve the following quadratic equation. (x - 7)(x + 2) = 0
x = 7 x = -2
Solve the following quadratic equation by using square roots: x2 = 4
x = 2 x = -2
Factor: x2+ 6x
x( x + 6)
2x(x+3)
2x2+6x
What is the y-intercept of f(x)=x2+8x+15
15
Use the null factor law to solve (x+2)(x+1) = 0
x = -2 x = -1
Solve the following quadratic equation by using square roots: x2 = 25
x = -5 and 5
Factor: x2 +5x+6
(x +2)(x + 3)
-3x(x-4)
-3x2+12x
What are the x-intercepts of y=x2 + x -12
x = 3 and -4
Solve the following quadratic equation by factoring. x2 - 6x + 5 = 0
x = 5 x = 1
Solve the following quadratic equation by using square roots: 4x2 = 400
x = 10 x = -10
Factor: x2 - 2x - 24
(x +4)(x - 6)
(x+10)(x+1)
x2 +11x +10
What is the equation of axis of symmetry of y=(x-5)(x+3)
x=-1
Solve the following quadratic equation by factoring.
x2 - 5x - 14 = 0
x = -2 x = 7
Solve the following quadratic equation x2 -121=0
x = -11 and 11
Factor:x2 + 10x +16= 0
(x +2)(x + 8)
(2x+3)(x-4)
2x2 -5x-12
What is the turning point of this parabola? Is this a concave up or concave down parabola?
y = -x2+5
T.P = (0, 5) and concave down
Use the Null Factor Law to solve (2x-1)(3x+5) = 0
x = 1/2 and x=-3/5
Solve the following quadratic equation 2x2 = 162
x = 9 and -9
Factor: x2 - 2x - 15
(x - 5)(x + 3)
(2x-5)(2x+3)
4x2 - 4x - 15 = 0
What is the turning point of this parabola y = (x-3)2 + 5?
(3, 5)