Step-by-step explanation:
not sure about last question but...did it with all my will..
The correct answer is 42x^4-24x^3+12x^2
Questions like this ("how much higher is x than y?") are answered by computing the ratio of the two quantities.
In fact, for example, the answer to "how much higher is 10 than 5?" is 2, because 10:5 = 2, and indeed 10 is twice as much as 5.
So, we have
So, the melting temperature of platinum is about one time and a half higher than the melting temperature of gold.
Easy...
to even begin to factor..you must factor out a 3, to simplify your answer.
3(12
-7x-10)
Now, you can factor.
So..to find the answer...
12*-10=-120x
and
you would use -7x
What multiplies to -120..but adds to -7?
-15*8=-120
and
-15+8=-7
To find the answer, plug in what you know..
3(3x+2)(4x-5)
Thus, your answer.