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Katen [24]
3 years ago
11

Solve the equation

Mathematics
1 answer:
Vikki [24]3 years ago
4 0

Answer:

x ≈ - 5.32, x ≈ 1.32

Step-by-step explanation:

Given

x² + 4x - 7 = 0 ( add 7 to both sides )

x² + 4x = 7

To complete the square

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

x² + 2(2)x + 4 = 7 + 4

(x + 2)² = 11 ( take the square root of both sides )

x + 2 = ± \sqrt{11} ( subtract 2 from both sides )

x = - 2 ± \sqrt{11}

Thus

x = - 2 - \sqrt{11} ≈ - 5.32 ( to 2 dec. places )

x = - 2 + \sqrt{11} ≈ 1.32 ( to 2 dec. places )

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Rufina [12.5K]

Answer:

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Step-by-step explanation:

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Knowing the angles are equal to each other you can make the equation

2x + 29 = 9x - 13

then you solve for x in this equation

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(subtract 2x from both sides)

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6 0
3 years ago
Someone please help me with math linear equations 3x + 2y = 12
vodka [1.7K]
3x + 2y = 12
subtract 3x from both sides
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Hope this helped!! :)

6 0
3 years ago
Alexis buys groceries using her credit card her card has an APR of 19.99% and she must pay at least 5% of the balance at the end
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Answer:

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To get the finance charge, multiply the average daily balance by the DPR and then by 30 days:

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Hope this helps!!  Have a great day!

7 0
3 years ago
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2 years ago
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oksano4ka [1.4K]

Answer:

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3 years ago
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