Solve 4x2 = 20x
x = 4, x = 5
x = 4, x = −5
x = 0, x = 5
x = 0, x = −5

When the quadratic equation y = (x − 2)(3x + 1) is written in standard form, what is the value of the coefficient "b"?
−5
3
−2
5

What are the x-intercept(s) of the graph of y − x2 = −3x − 10?
(2, 0) and (−5, 0)
(−2, 0) and (5, 0)
(−2, 0) and (−5, 0)
(2, 0) and (5, 0)

Identify which equation is a quadratic equation.
y = −5x − 3
y = −4x(x + 10) + 34
y + x2 = (x − 4)(x + 3)
y − 2

Determine whether the graph of y = 2x2 − 5x + 8 opens up or down and
whether it has a maximum or minimum point.
Down and Maximum
Down and Minimum
Up and Minimum
Up and Maximum

What are the solutions of 6x2 − x − 15 = 0?
x = 5 over 6, x = −3
x = −5 over 6, x = 3
x = 3 over 2, x = −5 over 3
x = −3 over 2, x =5 over 3
Part 1: Solve each of the quadratic equations below. Show your work. (3 points)

x2 − 25 = 0 and x2 = 2x + 15

Part 2: Describe what the solution(s) represent to the graph of each. (2 points)

Part 3: How are the graphs alike? How are they different? (2 points)

Please explain how to solve this. I want to learn! :)

Question

Solve 4x2 = 20x
 x = 4, x = 5
 x = 4, x = −5
 x = 0, x = 5
 x = 0, x = −5

When the quadratic equation y = (x − 2)(3x + 1) is written in standard form, what is the value of the coefficient "b"?
 −5
 3
 −2
 5

What are the x-intercept(s) of the graph of y − x2 = −3x − 10?
 (2, 0) and (−5, 0)
 (−2, 0) and (5, 0)
 (−2, 0) and (−5, 0)
 (2, 0) and (5, 0)

Identify which equation is a quadratic equation.
 y = −5x − 3
 y = −4x(x + 10) + 34
 y + x2 = (x − 4)(x + 3)
y − 2

Determine whether the graph of y = 2x2 − 5x + 8 opens up or down and
whether it has a maximum or minimum point.
 Down and Maximum
 Down and Minimum
 Up and Minimum
 Up and Maximum

What are the solutions of 6x2 − x − 15 = 0?
 x = 5 over 6, x = −3
 x = −5 over 6, x = 3
 x = 3 over 2, x = −5 over 3
 x = −3 over 2, x =5 over 3
Part 1: Solve each of the quadratic equations below. Show your work. (3 points)

x2 − 25 = 0 and x2 = 2x + 15

Part 2: Describe what the solution(s) represent to the graph of each. (2 points)

Part 3: How are the graphs alike? How are they different? (2 points)

Please explain how to solve this. I want to learn! :)

anonymous · Answer

sorry you dont have to answer all just need help with a few :)

anonymous · Answer

I would love to understand how to do this :(

anonymous · Answer

4x2=20x
4x2-20x=0
4x(x-5)=0
either 4x=0 or x-5=0 or both.
so x=0 and x=5.

anonymous · Answer

y=(x-2)(3x+1)
y=$$3x ^{2}+x-6x-2$$
y=\3x ^{2}-5x-2\
standard form of quad equation is ax2+bx+c=0
so coeff of b is -5

anonymous · Answer

y=-4x(x+10+34) is only the quad eqn of all as it has x raised to power 2.no one else has.
in option 3 power of 2 get cancelled.

anonymous · Answer

awesome! I'm understanding it thank you so much! :)

anonymous · Answer

6x2-x-15=0
6x2-10x+9x-15=0
2x(3x-5)+3(3x-5)=0
(2x+3)(3x-5)=0
either of these are 0 or both
so 2x+3=0
2x=-3
x=-3/2
and
3x-5=0
3x=5
x=5/3
so x=-3over 2 and 5over3

anonymous · Answer

awesome!! Thank you 100,00 times your a really big help :)

anonymous · Answer

anytime dear:) just in case m not here mail ur queries at rogerspoj@gmail.com

anonymous · Answer

Great I will definitely do that!

anonymous · Answer

2x^2-5x+8=0 has a min point at(1.25,4.875) and has shape like bowl. http://graph.tk/

anonymous · Answer

ok :)