Answer:
The correct answer is 28
Step-by-step explanation:
Answer:
x = 3.51
Step-by-step explanation:
Since, formula to determine the area f a triangle is,
Area = 
8 = 
16 = x(3x - 7) + 1(3x - 7)
16 = 3x² - 7x + 3x - 7
16 = 3x² - 4x - 7
0 = 3x² - 4x - 23
3x²- 4x - 23 = 0
By quadratic formula,
x = 
x = 
x = 
x = 
x = 3.51, -2.18
But the length of sides can't be negative.
Therefore, x = 3.51 will be the answer.
OPTION A , C,D
are the correct choices because all of them are equal to √5
4x^2+4x-8=0
X^2+x-2=0
(X+2)(x-1)=0
X= -2 or 1