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3 years ago

13

I have test corrections and I'm having trouble figuring out what I did wrong. I just need how to get the answer and I should be

able to figure it out.
Find Angle ABC

1 answer:

Mrrafil [7]3 years ago

3 0

Answer:

The answer is 68 :D

Step-by-step explanation:

(Just read the whole comment ;P)

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Answer:

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Step-by-step explanation:

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2 years ago

What’s the vertex form of F(x)=x^2+2x-3

kupik [55]

Answer:

$\large\boxed{f(x)=(x+1)^2-4}$

Step-by-step explanation:

$\text{The vertex form of a quadratic equation}\ f(x)=ax^2+bx+c:\\\\f(x)=a(x-h)^2+k\\\\(h,\ k)-\text{vertex}\\=====================================$

$\bold{METHOD\ 1:}\\\\\text{convert to the perfect square}\ (a+b)^2=a^2+2ab+b^2\qquad(*)\\\\f(x)=x^2+2x-3=\underbrace{x^2+2(x)(1)+1^2}_{(*)}-1^2-3\\\\f(x)=(x+1)^2-4\\==============================$

$\bold{METHOD\ 2:}\\\\\text{Use the formulas:}\ h=\dfrac{-b}{2a},\ k=f(k)\\\\f(x)=x^2+2x-3\to a=1,\ b=2,\ c=-3\\\\h=\dfrac{-2}{2(1)}=\dfrac{-2}{2}=-1\\\\k=f(-1)=(-1)^2+2(-1)-3=1-2-3=-4\\\\f(x)=(x-(-1))^2-4=(x+1)^2-4$

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3 years ago

I need to find the equations for these solutions

wlad13 [49]

Answer:

hope these answers helps u out

Step-by-step explanation:

PLZZ MARK ME AS BRAINLIEST

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