What are the factors of x² + 3x - 4?
2 answers:
Answer:
(x + 4) and (x - 1)
Step-by-step explanation:
x² + 3x - 4
You want to look for what numbers can be multiplied in order to get the 3rd number (the -4) that can also add/subtract to the middle number (the 3)
simply,
(4)(-1) = -4
(4) -1 = 3
to make sure you can also reverse it and if you get to the same thing that you started with it is correct.
(check photo)
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Answer:
12 m
Step-by-step explanation:
Given that the design, ABCD, was dilated to get a photocopy, EFGH, a scale factor or ratio was multiplied by the original lengths of the design to get the new measurement of the photocopy.
Thus, we are given the ratio, CD:GH = 2:3.
This means, any of the corresponding lengths of both figures would be in that same ratio.
Using the ratio of the design to the photocopy, 2:3, we can find the length of side EH of the photocopy.
The corresponding side of EH in the design is AD = 8m. Thus, AD to EH = ⅔
Cross multiply
Divide both sides by 2 to make EH the subject of formula
The length of side EH = 12 m