<span> $\displaystyle x^2 - 8x + 41 = 0 \\\\ \Delta=b^2-4ac \\ \Delta=(-8)^2-4\cdot1\cdot41 \\ \Delta=64-164 \\ \Delta=-100 \\ \\ X_{1,2}= \frac{-b\pm i \sqrt{-\Delta} }{2a} = \frac{8 \pm 10i}{2} \\ \\ X1=4-5i \\ \\ X2=4+5i$ </span>

5 0

3 years ago

My quiz had 15 questions, I got a score of 67.8%. how many questions did I get wrong?

Ne4ueva [31]

You take 67.8/100×15
10.17
then take 15-10.17 the answer will be the wrongs u got
=4.83

4 0

3 years ago

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How would you find the surface area of a cube, if you knew the area of one face ???

Nataly_w [17]

Answer:

8 0

3 years ago

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