There are different ways to solve a quadratic equation, the main ones that i'm thinking about right now are: 1) factor the equation as a product: ex: x^2+ 4x + 3 =0 (x+3) (x+1) = 0 x=-3 and x=-1 are the solutions. To find (x+p) and (x+q) you have to think that (p+q )have to be equal to the number that is multiplied by x, in my example it was 4 (3+1=4), (p times q) have to be equal to the last number of the quadratic equation, the one that is not multiplied by any x, that in my example is 3 (3 x 1= 3)
2) The other way to solve a quadratic function is by using a formula: given: ax^2 +bx +c=0 x= (-b +/- <span>√(b^2 -</span> 4ac)) / 2a
ex: 3x^2 + 4x -2=0 x= (-4 +/- √16-4(3)(-2)) / 6= (-4 +/- √16+24)/6= (-4 +/- <span>√40) / 6 now there are 2 possibilities: x= (-4+</span><span>√40) /6 and x= (-4 - </span><span>√40) / 6 I hope the examples were clear enough also if i did't get very nice numbers. Look closely to the sings + and -, they are very important</span>
Explanation: 2(n-6)+4 you bring 2 into the parentheses so 2 x n is just 2n then 2 x -6 = -12 New equation 2n-12 +4 Now you combine-12 and 4 which is -8 Finale equation: 2n-8
There are 15 pieces of the same size candy in the bag. Two are orange flavored, six cherry flavored. So the probability of picking an orange or a cherry flavored candy is 6/15+2/15=8/15≈0.5