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Comment on Combining Factoring Techniques
For the question, https:/
Question link: https:/
Question link: https://gre.myprepclub.com/forum/if-x-3-3x-2-10x-0-indicate-all-the-poss...
Be careful.
The question asks us to "indicate all the possible values for the SUM OF ANY TWO SOLUTIONS for x."
So, the possible solutions for x are: x = 0, x = -5, and x = 2
Now let's look at the 3 possible SUMS of two solutions:
1) 0 + (-5) = -5
2) 0 + 2 = 2
3) (-5) + 2 = -3
So, the three possible SUMS are: -5 (B), 2 (F) and -3 (C)
Does that help?
Cheers,
Brent
https://gre.myprepclub.com/forum
I solved this question through simultaneous equations:
4x - 2y = 18
6x + 3y = 18
Giving me a value of x as 3.75 and y = -1.5
When I put these values in the B choice the answer is 50 something making it the larger value.
What am I doing wrong?
Question link: https:/
Question link: https://gre.myprepclub.com/forum/evaluate-4x-2y-6x-3y-2164.html
I'm not sure how you got the equations 4x - 2y = 18 and 6x + 3y = 18
If (something)(something else) = 18, we can't conclude that (something) = 18 and (something else) = 18
In other words, if AB = 18, then we can't say that A = 18 and B = 18
Here's my full solution: https://gre.myprepclub.com/forum/evaluate-4x-2y-6x-3y-2164.html#p29065
Cheers,
Brent
Please where did you teach
I first discuss special
I first discuss special products at 2:40 in the following video: https://www.greenlighttestprep.com/module/gre-algebra-and-equation-solvi...
Then, I discuss factoring special products at 4:48 in this video: https://www.greenlighttestprep.com/module/gre-algebra-and-equation-solvi...
Cheers,
Brent
Given: x³ + 3x² - 10x = 0
Factor out x to get: x(x² + 3x - 10) = 0
Factor quadratic to get: x(x + 5)(x - 2) = 0
So, x = 0, or x + 5 = 0, or x - 2 = 0
If x + 5 = 0, then x = -5
If x - 2 = 0, then x = 2
The 3 solutions are: x = 0, x = -5, and x = 2
Adding all 3 possible pairs of solutions, we get the following sums: -5, 2, and -3
why did you add 3 possible pairs of solutions? I get -5, 2 but why -3?
Question link: https:/
Question link: https://gre.myprepclub.com/forum/if-x-3-3x-2-10x-0-indicate-all-the-poss...
The question asks us to find all possible values for the sum of ANY TWO solutions for x.
The 3 solutions are: x = 0, x = -5, and x = 2
0 + (-5) = -5
0 + 2 = 2
(-5) + 2 = -3
Does that help?
Cheers,
Brent