If x=4 can what is the area of this triangle
HELP PLZ

area = 448 cm2

Step-by-step explanation:

multiply the 7 and 8 by 4 to get 28 and 32. then multiply 28 and 32 to get 896. divide that by 2 to get your answer 896/2=448

898.1666667

step-by-step explanation:

5389/6 = 898.1666667

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