A) y = 2x + 18, y =- 4x; b) 24
22 Determina be c in modo che le parabole di equa-
zioni y = x2 + bx e y = -x2 – 2x + c intersechi-
no la retta r di equazione y =-5 nel punto di
ascissa 1. Verifica che le due parabole sono tangen-
ti, determina l'equazione della tangente comunete
calcola l'area del triangolo formato da t, r e l'asse y.
(y = x2 - 6x, y = – x2 – 2x – 2; t: y = - 4x - 1; 2]
alle parabole di equazioni y = x2 - 4x + 4 e

solution:

the given function is ,

      =

the three roots of this quadratic function is , 0 ,8 and 10.all the roots are real and rational.

if a quadratic equation is of the form ,

sum of the roots = a + b +c= 0+8+10=18=  

product of roots taken two at a time = a b + b c+ c a = 0+80+0=80 =  

product of roots = a b c = 0=  

there are 11 doors in a hall starting from 0 to 11.the entry in the hall is permitted through gate number 0 and exit is allowed through only gate number 8 and 10.so, three roots(0,8,10) of quadratic function is given by entry and exit route of this hall.

wait nvm i know the correct answer now its 100%   81 square feet

~batmans wife dun dun

b. 18

step-by-step explanation:

so the equation for this is:

ab^2=ac⋅ad

ab being the top length of 6 and ac being the length of 2 and ad being the length of x. let's plug into the equation:

6^2 = 2x

now lets just solve for x:

36 = 2x

18 = x

i hope that !