NEED HELP write an expression for :
the product of twice a number and 7 less than the number

oink

Step-by-step explanation:twice a number"

→

2

n

"twice a number and k"

→

2

n

+

k

"7 less than twice a number and k"  

→

(

2

h

+

k

)

−

7

is there supposed to be a diagram or a graph for this one? ?

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