sorry to say, but you got the first question wrong.1.A
expeCting aBotu 7-8
exact same as mine.
C.Anyone know the answer to q10?
5 can't be B as the three roots must multiply for positive 42
product of roots is -d/a thus = -42.5 can't be B as the three roots must multiply for positive 42
Oh god... Forgot about factor = (x - the root)They have to times for -42, since the product of the roots is -d/a
I left it to the end but ran out of time and guessed C, yassssC.
use distance formula on both and set them equal. you get it out with some mild algebra bashing
did this as wellYou don't need any serious algebra for Q10.
Assume a>0, b>0, b>a (or the other way round if you like), then draw a diagram.
By symmetry you can see that it must pass through the origin, eliminating B and D.
Then you just need to choose the option with the correct gradient.