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elixir [45]
2 years ago
9

Solve the system by substitution. 7x-3y=-25 4x+5=y Simplify ( , )

Mathematics
1 answer:
Lynna [10]2 years ago
3 0

Answer:

nznsjisisjnsnaksodood

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Use quadratic formula solve .7x^2 - 28x - 7​
beks73 [17]

Answer:

x = 2 + sqrt(5) or x = 2 - sqrt(5)

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Solve for x over the real numbers:

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x^2 - 4 x - 1 = 0

Add 1 to both sides:

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Add 4 to both sides:

x^2 - 4 x + 4 = 5

Write the left hand side as a square:

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Take the square root of both sides:

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Add 2 to both sides:

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Add 2 to both sides:

Answer:  x = 2 + sqrt(5) or x = 2 - sqrt(5)

6 0
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