Would like a bit of help on a maths quiz. No 1...I know what I am supposed to do, factorising, and putting a,b,c into the x = b+/- sqrt(b^2 etc etc formula... but im getting the wrong answer. So maybe my factorising is wrong... Can someone show me a step by step process for this question.
And No 2, Im a bit lost, so any help would be appreciated.
1)Give the turning point of the following quadratic and state whether it is a maximum or minimum.
y = (−8+9x) (−4x−5)
2) If a^2 = b^2 + 3 and a − b = 6, what is a + b? Please give an exact answer, using fractions if necessary; no decimals.
Thanks for that!
Would you have an idea about my original No 1 question...
1)Give the turning point of the following quadratic and state whether it is a maximum or minimum.
y = (−8+9x) (−4x−5)
I was solving it by factorisation, but am getting a wrong answer...
Is this wrong... y = -36x^2 - 12x + 40.... and then working from there..
y = (−8+9x) (−4x−5)
simple foil gives:
y=-36x^2-13x+40
complete the square, this will give you the quadratic in vertex form, which is the turning point.
although after the foil, it is evident that it is a negative x value, this a maximum because the parabola is opening down