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4 years ago

By using the completing the squares method solve Xsquared-8x+3=0

Mathematics

2 answers:

svet-max [94.6K]4 years ago

8 0

Answer:

Step-by-step explanation:

x^2 -8x +3 = 0

(x^2 - 8x + 16) = -3 + 16

(x-4)^2 = 13

x - 4 = (+/-)sqrt(13)

x = 4 +/- sqrt(13)

Aleonysh [2.5K]4 years ago

6 0

Answer:

x = 4 ± $\sqrt{13}$

Step-by-step explanation:

Given

x² - 8x + 3 = 0 ( subtract 3 from both sides )

x² - 8x = - 3

To complete the square

add ( half the coefficient of the x- term )² to both sides

x² + 2(- 4)x + 16 = - 3 + 16

(x - 4)² = 13 ( take the square root of both sides )

x - 4 = ± $\sqrt{13}$ ( add 4 to both sides )

x = 4 ± $\sqrt{13}$

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Here are two simultaneous equations

jeka94

Step-by-step explanation:

Given -

Equations

x + y = 8
x - y = 3

To Find -

which pair of coordinates satisfies both equation

Now,

adding both equation, we get -

x + y + x - y = 8 + 3

2x = 11

x = 11/2

Now, substituting the value of x on x + y = 8, we get -

5.5 + y = 8

y = 8 - 5.5

Hence,

(5.5, 2.5) pair of coordinates satisfies both equations.

5 0

3 years ago

Read 2 more answers

Please help will mark as brainless

Wewaii [24]

Answer:

1. r = $\sqrt[3]{\frac{3v}{4\pi } }$

divide v by 4/3, this is the same as multiplying v by 3/4 so you have 3v/4

then divide v by $\pi$ so you now have 3v/4 $\pi$

then get rid of the ^3 on r by putting the solution for r under a ∛

2. a) The equation might need to be written in terms of a because you may not know the value of a, but you know the value of everything else. If this is the case then you can simply rewrite the equation so that you can plug it all into a calculator and avoid certain possible errors.

s = ut + 1/2 $at^{2}$