quadratic function

[pearl willow]

Help please

[wispy jasper]

Complete the square to find the turning point

[pearl willow]

what square?

[keen gust]

lmaooo

its basically a method to write a quadratic in a different format

it gives the turning point of the graph

[pearl willow]

@keen gust I'm still super confused

[agile bronze]

you can write a quadratic in a different format and this format is given as:

(x+a)^2+b

[halcyon knoll]

Basically the x value is the average of the roots

So u find x

And then sub that in the eq for y

That’s what it means by use the symmetry

Does that make sense @pearl willow

[keen gust]

dyk what a maximum is

[wary nymph]

guys the poor child is in y9

2

hh

£

no

@pearl willow f we use line x as out line of symmetry the equation gets flipped around like a pancake

so x^2 +10 + 21

then you complete the square but u havent been taught that

welp

time to learn something new

wait actually

maybe something like

we know (x+7) and (x+3) and x = -7 and -3
(-7 + -3)/2 = -10/2 = -5
so the turning point is (-5,y) but im not sure how to get y

hmmm

oh wait im so dumb

x = -5, so put is back into the original equation

we know (x+7) and (x+3) and x = -7 and -3
(-7 + -3)/2 = -10/2 = -5 since the turning point is like "in the middle" of the roots
so the turning point is (-5,y)

then put -5 back into the -x^2-10x-21

:)

-25+50-21 = 4

so the turning point would be (-5,4)

[keen gust]

or differentiate 😻

[wary nymph]

Year 9 piano

And go do van pelts homework smh

Why does Kim gotta give u his work

[halcyon knoll]

@pearl willow ???

[keen gust]

shush

do u even do further maths

[wary nymph]

Yes. . .

[keen gust]

you werent in class today