In the given ∆ABC, DE || BC. What is the value of x?
1 answer:
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Answer:
Step-by-step explanation:
Base is an equilateral triangle
slant hight= 12 in
side of base= 5 in
so, perimeter of base = 3(5)=15 in
lateral area = 1/2 pl =1/2 (15)(12) in
=90 in²
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To solve for a variable, you need to get it (x) by itself.
2x² - 4x + 5 = 6 Subtract 6 from both sides
2x² - 4x - 1 = 0 Plug this into the Quadratic Formula
a = 2 , b = -4 , c = -1
x =
Plug in your values
x =
Simplify
x =
Simplify
x =
Simplify by removing a 2 from every term
x =
Simplify by taking the fraction apart
x =
Change 
to 1
x = 1
Simplify 
to 
x = 1
2x² - 4x + 5 = 6 Subtract 6 from both sides
2x² - 4x - 1 = 0 Plug this into the Quadratic Formula
a = 2 , b = -4 , c = -1
x =
x =
x =
x =
x =
x =
x = 1
x = 1