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3 years ago

Solve by completing the square:X^2+6x-12=0

1 answer:

5 0

X² + 6x -12 = 0
x = -(6) +/- √((6)² - 4(1)(-12))
 2(1)
x = -6 +/- √(36 + 48)
 2
x = -6 +/- √(84)
 2
x = -6 +/- 2√(21)
 2
x = -3 + √(21)
x = -3 + √(21) x = -3 - √(21)

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solniwko [45]

Answer:

$x = 75$

Step-by-step explanation:

Given

See attachment

Required

The value of x that makes l and m parallel

Let the angles be ABC (See attachment 2)

$\angle CAB$ is corresponding to 50 degrees. So:

$\angle CAB=50$

$\angle ABC$ is corresponding to 55 degrees. So:

$\angle ABC = 55$

This means that:

$\angle ABC + \angle CAB + x = 180$

$50 +55 + x = 180$

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2 years ago

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Step-by-step explanation:

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Answer:

Step-by-step explanation:

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