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Tom [10]
3 years ago
11

What is y=-x^2-14x-59 in vertex form

Mathematics
1 answer:
marusya05 [52]3 years ago
5 0

The equation of a parabola given y=-x^2-14x-59

We have to write it in vertex form.

The vertex form of a parabola is y=a(x-h)^2+k

So to write it in vertex form we have to make the right side as a perfect square by using completing the square method.

y= -x^2-14x-59

y=-(x^2+14x+59)

Here 14x given. By dividing 14 by 2 we will get 7. So we have to add and subtract (7)^2 to the right side.

y= -[x^2+14x+(7)^2-(7)^2+59]

y=-[x^2+14x+(7)^2-49+59]

We know that, a^2+2ab+b^2 = (a+b)^2, so x^2+(2)(x)(7)+7^2 = (x+7)^2.

y= -[(x+7)^2-49+59]

y=-[(x+7)^2 +10]

y=-(x+7)^2-10

So we have got the required vertex form of the parabola.

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