I need help ( method )
#Solving quadratics by completing the square
lavish viper
This is wrong
(t+3)^2 - 13 = 0
(t+3)^2 = 13
t+3 = +-sqrt(13)
t = -3 +-sqrt(13)
Be careful with your signs, you should always switch them when u move something from one side to another
lavish viper
Is that u^2 + 8u - 3 = 0
Soz having abit of a hard time decoding if thats an 8 or 6
lavish viper
Again same thing, u want the variable (u) to be alone on one side
Its not wrong
u = -4 +- sqrt(19)
lavish viper
Thats fine ur in y11 just pattern this so that u dont lose silly marks in exams
glacial mirage
Yep
It’s all of higher
So I’m revising it last minute bc I had English paper 2 on Friday
lavish viper
Yeah just be careful with the signs, u make a negative a positive when u move it over and u make a positive a negative when u move it to the other side as u know
glacial mirage
👍
lavish viper
So I’m revising it last minute bc I had English paper 2 on Friday
Yh I get u lol
But in real gcses the exams will be more spread out
glacial mirage
I still need to do circle thereoms
lavish viper
So you won't have to rush
glacial mirage
But in real gcses the exams will be more spread out
Yh ofc
lavish viper
I still need to do circle thereoms
Go learn them now, usually they're marks heavy
Esp when u have like 2/3 in one problem
glacial mirage
?
I will after I do the quadratics
I’ll do all of algebra
Since I’m nearly done
How is this not square root of 19?
lavish wharf
(t+b/2)^2+c - (b/2)^2 use this formula
lavish wharf
dont use this formula 🤣
it's quite literally the formula for completing the square for a quadratic mate.