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3 years ago

X-2y=-25 3x-y=0 need help solving

Mathematics

1 answer:

lukranit [14]3 years ago

8 0

$x-2y=-25\\
3x-y=0\\\\
x-2y=-25\\
y=3x\\\\
x-2\cdot3x=-25\\
x-6x=-25\\
-5x=-25\\
x=5\\\\
y=3\cdot5\\
y=15
$

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Answer:

Please check the explanation.

Step-by-step explanation:

Given the equation

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We know that the degree of the equation is the highest power of x variable in the given equation.

In the equation 0 = 2x² -3x -7 the highest power of x variable in the given equation is 2.

Thus, the degree of the equation is 2.

Also in the equation 0 = 2x² -3x -7, the unknown variable is 'x'.

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Add (-3/4)² to both sides

$x^2-\frac{3x}{2}+\left(-\frac{3}{4}\right)^2=\frac{7}{2}+\left(-\frac{3}{4}\right)^2$

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$\mathrm{For\:}f^2\left(x\right)=a\mathrm{\:the\:solutions\:are\:}f\left(x\right)=\sqrt{a},\:-\sqrt{a}$

solving

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$x-\frac{3}{4}=\frac{\sqrt{65}}{4}$

Add 3/4 to both sides

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$x=\frac{-\sqrt{65}+3}{4}$

So the solution of the equation will have the values of x such as:

$x=\frac{\sqrt{65}+3}{4},\:x=\frac{-\sqrt{65}+3}{4}$

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