3 years ago

Find the solutions of (x – 4)(x – 4) = 0.

1 answer:

7 0

Answer:

Step-by-step explanation:

(x – 4)(x – 4) = 0.

So factor are x-4=0

X=4 (D) is the answer

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iris [78.8K]

Graph the line using the slope and y-intercept, or two points.
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−
1
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1
Y-Intercept:
−
2
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y
0
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1
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3
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vovikov84 [41]

Plug $y=x^2$ into the equation of the ellipsoid:

$x^2+7(x^2)^2+7z^2=49$

Complete the square:

$7x^4+x^2=7\left(x^4+\dfrac{x^2}7+\dfrac1{14^2}-\dfrac1{14^2}\right)=7\left(x^2+\dfrac1{14}\right)^2+\dfrac1{28}$

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which resembles the equation of a circle, and suggests a parameterization is polar-like coordinates. Let

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$y(t)=x(t)^2=\sqrt{\dfrac{1371}{196}}\cos t-\dfrac1{14}$

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(Attached is a plot of the two surfaces and the intersection; red for the positive root $x(t)$ , blue for the negative)

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