math problem
@Florisalreadytaken
@Laylalyssa
@snowflake0531
Do you know the vertex form of a quadratic equation? y = (x-h)^2 + k where (h, k) is the vertex What is the vertex in your image?
-3, 4
Good, so h is -3 and k is 4 so y = (x - (-3))^2 + 4 x - (-3) is the same thing as x+3 So we get y = (x+3)^2 + 4 Can you expand that? What is (x+3)^2 = ?
Remember the formula \( (a+b)^2 = a^2 + 2ab + b^2\)
x^2 + 6x + 9
Good so now we have y = (x+3)^2 + 4 y = x^2 + 6x + 9 + 4 Just simplify by adding the like terms. What is 9 + 4 = ?
13
And so what's your final answer?
Where did you get the 2 from?
i leave it blank?
remember that \( x^2 \) is the same thing as \( 1 x^2\) when they don't write any number in front of it, that means it's `1`
That's correct
wait
the quadratic function is flipped
lol
so we have y = a(x-h)^2 + k and we said that (h, k) is (-3, 4) and we need to figure out what 'a' is y = a(x + 3)^2 + 4
If you look at the graph, you can see there's a point (-2, 2) on the line so we can use that to find the value of 'a' and then we distribute just like we did earlier 2 = a(-2+3)^2 + 4 what is a = ?
im not sure but i have a new uestion
Sure, post it
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