Question

Find the value of x.

Answer 1

x=4

Explanation:

Answer 2

√21 or 4.58

Explanation:

area of triangle can be found in different ways, and they are equal as:

1/2*x*(7+3)= 1/2*√(x²+3³)*√(x²+7²)

(10x)²= (x²+3³)*(x²+7²)

x²= y

• 100y= (y+9)(y+49)
• y²+58y+9*49-100y=0
• y²-42y +441=0
• y=21

x²=21

x=√21 = 4.58