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Katyanochek1 [597]

3 years ago

10

Please help I need this immediately

1 answer:

svetlana [45]3 years ago

8 0

Answer:

The choose B. x = 7 , x = – 15

(x+4)-5=6

x +4-5=6 —> x=6-4+5 —> x= 7

– (x+4)-5=6 —> -x -4-5=6—> x = -4 -5 -6 —> x = – 15

I hope I helped you^_^

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nata0808 [166]

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Step-by-step explanation:

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<h3>~AH1807</h3>

3 0

3 years ago

Read 2 more answers

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Scorpion4ik [409]

Answer:

For k = 6 or k = -6, the equation will have exactly one solution.

Step-by-step explanation:

Given a second order polynomial expressed by the following equation:

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This polynomial has roots $x_{1}, x_{2}$ such that $ax^{2} + bx + c = (x - x_{1})*(x - x_{2})$ , given by the following formulas:

$x_{1} = \frac{-b + \sqrt{\bigtriangleup}}{2*a}$

$x_{2} = \frac{-b - \sqrt{\bigtriangleup}}{2*a}$

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If $\bigtriangleup = 0$ , the equation has only one solution.

In this problem, we have that:

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$\bigtriangleup = k^{2} - 4*3*3$

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We will only have one solution if $\bigtriangleup = 0$ . So

$\bigtriangleup = 0$

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$k^{2} = 36$

$k = \pm \sqrt{36}$

$k = \pm 6$

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