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2 years ago

13

Solve each equation with the quadratic formula. x2 -7x +10= 0

1 answer:

zhenek [66]2 years ago

5 0

Answer: x=5, x=2

Step-by-step explanation: try symbolab for these questions...it helps out a lot.

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A submarine changes its position by −7 meters every second. What is the change in the submarine's position after 300 seconds?

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Based on the graph, what does (1,3) represent ?

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I hope this helps!

-Mikayla

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3 years ago

Values of k for which the quadratic equation 2x - kx + k 0 has equal roots is

WARRIOR [948]

Answer:

The answer is D.

Step-by-step explanation:

We have to apply Discriminant Law. When a quadratic equation, ax² + bx + c = 0 has equal roots so the discriminant will be 0. Then, you have to substitute the values into the formula :

$D = {b}^{2} - 4ac$

$let \: D = 0 ,a = 2,b = k,c = k$

$0 = {k}^{2} - 4(2)(k)$

${k}^{2} - 8k = 0$

$k(k - 8) = 0$

$k = 0$

$k - 8 = 0$

$k = 8$

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3 years ago