How u gonna do that in standard form
x3+x2+kx-2 And (x-1) is a factor
so,
Substitute +1 in places of only x
(1)*3+(1)*2+k*(1)-2
3+2+k-2
5+k-2
3+k Now, as (x-1) is a factor Equate 3+k to Zero
3+k=0
k=-3
Hope it helped you!!!!!!
I need help
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Answer:
42
Step-by-step explanation:
PEMDAS
-6*-5+12
multiply -6 and -5 first
30+12
then add
42
Answer:
2√5
cos x = -------------
5
Step-by-step explanation:
If tan x = 1/2 then what is cos x?
Recall that tan x is defined as the quotient sin x / cos x, so that in this case sin x / cos x = 1 / 2 = opp side / adjacent side. Also, recall that cos x = adj side / hypotenuse.
To determine cos x, we need to find the length of the hypotenuse. That, in turn, through use of the Pythagorean Theorem, is √(1^2+2^2), or √5.
Then cos x = adj side / hyp = 2/√5. Rationalizing the denominator, we get
2√5
cos x = -------------
5