Let f: f (x) = ax + b. Calculate a and b: a) knowing that f (1) = - 7 and f (-4) = - 22
b) if it is known that it has the origin -3 and root in
2/1

if you need , reply with more info. u.

b, i believe, but not sure.

the answer is a) y= 2 csc [0.5 (x+pi/2)]-1

step-by-step explanation:

let's call the solutions x₁ = (5 - 2√7)/3 and x₂ = (5 + 2√7)/3

then the equation is (x-x₁)(x-x₂) = 0

if you fill that in you get a lot of numbers which you can recognize as ax²+bx+c=0.

step-by-step explanation:

you can see that a=1 (there is just an x²)

b = (-5 -2√7 + 2√7 - 5)/3 = -10/3

c = -2√7)/3 ) * (-5+2√7)/3) = -1/3

so your answer is 3x^2 – 10x – 1 = 0