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3 years ago

Rewrite each expression as a polynomial in standard form(x-(2+i))(x-(2-i))

Mathematics

1 answer:

Daniel [21]3 years ago

3 0

Answer:

x² - 4 x + 3

Step-by-step explanation:

given expression

( x - ( 2 + i ) )( x - ( 2 - i ) )

on solving

= x² - (2 - i )x - (2 + i) x + (2 + i )(2 - i)

= x² - 2 x + i x - 2 x - i x + 2² - i²

using identity

(a+ b)(a-b) = a² - b²

= x² - 4 x + 2 - (-1) ∵ i² = -1

= x² - 4 x + 2 + 1

= x² - 4 x + 3

hence, the required polynomial equation is x² - 4 x + 3

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Deffense [45]

Answer:

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$\sqrt{16}$ = 4

when graphing (x,y) the x is the horizontal value of the point (east west)

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if you have y = x it would be a 45 degree line that goes from the lower left to the upper right....

if you compare the red line the point 1,1 (y=x) versus 1,4 (y=4x) in the blue line you will see that it is "stretched" upward

Step-by-step explanation:

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3 years ago

I need help I put 30 points for whoever helps me

artcher [175]

Answer:

$y=-x+1$

Step-by-step explanation:

Slope can be represented as rise over run (change y-values over change in x-values). Since the y-value is changing by -2 every time the x-value is changing by 2, the slope of the line must be $\frac{-2}{2}=-1$ .

In slope-intercept form $y=mx+b$ , $m$ represents the slope of the line, $b$ represents the y-intercept, and $(x, y)$ represent the coordinates of any point the line passes through.