Solve by GRAPHING
Sketch a graph that has no solution
See board
(x+2)(x-1)=0
x=-2, x=1
4x2 - 20x = 0
x=0, x=5
x2 - 7 = 29
x=6, x=-6
The equation h = -16t2 + 100 represents the height of an object dropped from 100 feet above the ground. How long would it take for the object to hit the ground?
2.5 seconds
If (4,0) and (-9,0) are the x intercepts on the graph of a quadratic function, which could represent the quadratic function?
(x-4)(x+9)=0
7x(3x-4) = 0
x=0, x=4/3
x2 - 8x - 9 = 0
x=9, x=-1
(x-3)2 - 81 = 0
x=12, x=-6
The equation h = -16t2 + 40 represents the height of an object dropped from 40 feet above the ground. How long would it take for the object to hit the ground?
1.58 seconds
Find the solution by graphing:
x2+2x+1=0
x=-1
What is the sum of the solutions to the equation
(x+2)(x-7)=0
5
49x2 - 100 = 0
x=10/7, x=-10/7
3x2 = 441
x = 7√3, x = -7√3
Find the solution by graphing:
x2+8x+12=0
x=-2, x=-6
5x2 - 3x - 2 = 0
x=1, x=-2/5
10 + 2(x - 1)2 = 154
x=1±6√2
Find the solution by graphing:
3x2-5x-3=0
x=-0.47, x=2.14
x(x+2) = -4x - 5
x=-1, x=-5
x=0, x=6