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anzhelika [568]
4 years ago
6

Help plz quick help helppp!!!

Mathematics
1 answer:
vesna_86 [32]4 years ago
6 0

A. 2x^2+5x-12 = (2 x - 3) (x + 4), factorable

B. 9x^2 + 4   not factorable

C. 5x^2 +5x + 1   not factorable

D. 3x^3 + 6x^2 = 3x^2(x + 2), factorable

Answer: B and C

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1. Let x[n] be a signal with x[n] = 0 for n<-1 and n > 3. For each signal given below, determine the values of n for which
valentina_108 [34]

Answer:

a) n<1 and n>5

b)  0 < n < -4

c)  n > 2 and n < -2

Step-by-step explanation:

The signal is given by x[n] = 0 for n < -1 and n > 3

The problem asks us to determine the values of n for which it's guaranteed to be zero.

a) x[n-2]

We know that n -2 must be less than -1 or greater than 3.

Therefore we're going to write down our inequalities and solve for n

n-2

Therefore for n<1 and n>5 x [n-2] will be zero

b) x [n+ 3]

Similarly, n + 3 must be less than -1 or greater than 3

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c)x [-n + 1]

Similarly, -n+1 must be less than -1 or greater than 3

-n+13-1\\-n>2\\n

Therefore, for n > 2 and n < -2  x[-n+1] will be zero

4 0
4 years ago
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3 years ago
What is an exponent? Because i am confused
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The expression is now read out as,

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8 0
2 years ago
3x+9=36<br><br> Show your steps
ozzi

Answer:

x=9

Step-by-step explanation:

3x+9=36

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8 0
3 years ago
Read 2 more answers
Is 7/10 greater than 1/2
Vanyuwa [196]
Yes because if you give them common denominators, then 7/10 stays the same and 1/2 turns into 5/10 so yes, it is larger.
HOPE I HELPED!!!
7 0
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