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What is the result of isolating [tex]$y^2$[/tex] in the equation below?

[tex]$4x^2 + 25y^2 = 100$[/tex]

A. [tex]$y^2 = 4 - \frac{4}{25}x^2$[/tex]
B. [tex]$y^2 = 100 - \frac{4}{25}x^2$[/tex]
C. [tex]$y^2 = 25 - \frac{4}{25}x^2$[/tex]
D. [tex]$y^2 = 100 - 4x^2$[/tex]

Answer :

Sure! Let's solve the problem step by step to isolate [tex]\( y^2 \)[/tex] from the given equation:

The original equation is:
[tex]\[ 4x^2 + 25y^2 = 100 \][/tex]

1. Subtract [tex]\( 4x^2 \)[/tex] from both sides:
To start isolating [tex]\( y^2 \)[/tex], we need to remove the [tex]\( 4x^2 \)[/tex] term on the left side. We do this by subtracting [tex]\( 4x^2 \)[/tex] from both sides of the equation:
[tex]\[ 25y^2 = 100 - 4x^2 \][/tex]

2. Divide by 25:
Now, to solve for [tex]\( y^2 \)[/tex], divide both sides of the equation by 25 to isolate [tex]\( y^2 \)[/tex]:
[tex]\[
y^2 = \frac{100 - 4x^2}{25}
\][/tex]

3. Simplify the expression:
Divide each term in the numerator by 25:
[tex]\[
y^2 = \frac{100}{25} - \frac{4x^2}{25}
\][/tex]

Simplify each term:
[tex]\[
y^2 = 4 - \frac{4}{25}x^2
\][/tex]

The final result for [tex]\( y^2 \)[/tex] is:
[tex]\[ y^2 = 4 - \frac{4}{25}x^2 \][/tex]

The correct option is A: [tex]\( y^2 = 4 - \frac{4}{25}x^2 \)[/tex]

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