Solve x^2+3x-18=0 for x
X=6 X=-3This simple question is the fundamental step of a vest argebra topics. Having a good understanding of this topic is crucial to studens who want to do well. Alternative method is to use quadratic formulas or complete the square which you should come across in future. In this case by deduction is completely fine.
RL
Related Maths GCSE answers
All answers ▸There are n sweets in a bag, 6 of which are red. The rest of the sweets are blue. Jen removes 1 sweet from the bag. Jen then takes another sweet from the bag. The probability that Hannah takes two red sweets is 1/3. Show that n²-n-90=0.
One of the teachers at a school is chosen at random. The probability that this teacher is female is 3/5 There are 36 male teachers at the school. Work out the total number of teachers at the school.
How can I know whether to multiply or add probabilities?
Expand the brackets (x+1)(x-4)