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mel-nik [20]
3 years ago
11

Py+qy=-4y+8 what is the solution for y

Mathematics
2 answers:
Helen [10]3 years ago
7 0

Answer:

y=8/(P+q+4)

Step-by-step explanation:

we can find out that three items have y

so we can get them together Py+qy+4y=8

next(P+q+4)y=8   so y=8/(p+q+4)

xz_007 [3.2K]3 years ago
5 0

Answer:

y = \frac{8}{P+q+4}

Step-by-step explanation:

Given

Py + qy = - 4y + 8 ← collect terms in y to the same side

Add 4y to both sides

Py + qy + 4y = 8 ← factor out y from each term on the left

y(P + q + 4) = 8 ← divide both sides by P + q + 4

y = \frac{8}{P+q+4}

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1. If a polynomial of Degree 4 has an imaginary zero at -2i and a real zero at 5, how many imaginary zeros does it have?
Vadim26 [7]

Answer:

Complex roots for polynomials equations will always come in conjugate pairs.  Since 1-2i is a root, 1+2i will also be a root.  (Just switch the sign of the imaginary part to its opposite.)

Step-by-step explanation:

So far we have 1-2i and 1+2i as roots.  We need two more to make a 4th degree polynomial.

x=1 with multiplicity of 2 means that we count the root twice when we write down the polynomial: (x - 1)(x - 1) = (x - 1)2

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Multiply the factors (FOIL):

[x - (1-2i)][x - (1+2i)] =

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x2 - 2x + 5

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Now multiply the two underlined expressions:

y = (x2 - 2x + 5)(x2 - 2x + 1)

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= x4 - 4x3 + 10x2 -12x + 5 by collecting like terms.

4 0
3 years ago
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