Vocabulary
What is the constant term in this quadratic equation? x2+4x-4=0?
-4
What is the A term in this quadratic equation. x2+4x+15=0
A=1
A piece of iron rod costs $60. If the rod was 2 meter shorter and each meter costs $1 more, the cost would remain unchanged. What is the length of the rod ?
12 meters
Solve the following quadratic equation by using the quadratic formula: x2−24=2x?
x=6, x=-4
What formula always work for quadratic equations?
The Quadratic Formula
What is the B term in this quadratic equation? 5x2+2x+7=0
B=2
A plot of land for sale has a width of x ft., and a length that is 8ft less than its width. A farmer will only purchase the land if it measures 240 square feet. What value of x will cause the farmer to purchase the land?
x=20ft
Solve the following quadratic equation by using the quadratic formula: x2+6x+5=0
x = -1, x = -5
What is the linear term in this quadratic equation? x2-8x+12=0
The linear term is -8x
What is the B and C term in this quadratic equation? x2+9x-26=0?
B=9 C=-26
Jason jumped off a cliff into the ocean in Acapulco while vacationing with some friends. His height as a function of time could be modeled by the function h(t) = -16t2 + 16t + 480 , where t is the time in seconds and h is the height in feet.
t=6, t=-5
Solve the following quadratic equation by using the quadratic formula: x2−9x+20=0
x = 5, x = 4
What is the quadratic term in this quadratic equation? 3x2+3x+21=0
The quadratic term is 3x2
What is the A and C term in this quadratic equation? 4x2+6-20=0
A=4 C=-20
The hypotenuse of a right angled triangle is 20 cm. The difference between its other two sides is 4 cm. Find the length of the sides.
x=12
Solve the following quadratic equation by using the quadratic formula: 2x2+9x+4=0
x = -1/2, x = -4
What formula is this? (-b±√(b²-4ac))/(2a) .
The Quadratic Formula
What is the A, B, C term in this quadratic equation? 3x2-6x+9=0
A=3, B=-6, C=9
The length of a rectangle is 5 inches more than twice a number. The width is 4 inches less than the same number. If the area of the rectangle is 15, find the number
x=5
Solve the following quadratic equation by using the quadratic formula: 4x2−17x−15=0
x = 5, x = -3/4