3 years ago

How do you solve x^2 plus 16x plus 63=0?

1 answer:

Alex3 years ago

8 0

$x^2+ 16x + 63=0 \\ \\a=1, \ b=16 , \ c=63 \\ \\ \Delta =b^2-4ac =16^2 -4\cdot1\cdot 63 = 256 -252 = 4 \\ \\x_{1}=\frac{-b-\Delta }{2a}=\frac{-16-\sqrt{4}}{2 }=\frac{-16-2}{2}=-\frac{-18}{2}=-9 \\ \\x_{2}=\frac{-b+\Delta }{2a}=\frac{-16+\sqrt{4}}{2 }=\frac{-16+2}{2}=-\frac{-14}{2}=-7 \\ \\ \\Answer : \ x= -7 \ \ or \ \ x= -9$

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Answer:

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Therefore,y=2z

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Simplifying,we have

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8 months ago

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ArbitrLikvidat [17]

Ok so pythagorean theorem is
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plug it in
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yass it works so that means they do make a right triangle

yes, they make a right triangle because they're a pythagorean triple and pythagorean theorem works when you plug the numbers in.

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2 years ago

How to write 53.02 in word form

Troyanec [42]

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2 years ago

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A hiker follows a trail to the top of a mountain. The trail is 15 miles long. She hikes at a rate of 2.5 mph. Which sketch repre

soldier1979 [14.2K]

15 miles/2.5 mph=15/2.5=6 hours left

so 6 hours, 15 miles which is option D

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