Solve the equation 2x^2+8x-1=0 by completing the square. Give your answer to 2 decimal places 4 marks
1 answer:
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So for this, you'll be using the pythagorean theorem, which is . In this case, 10 and 24 are the legs, and AB is the hypotenuse. Our equation will be
Firstly, solve the exponents:
Next, combine 100 and 576:
And lastly, square root both sides to get
And in short, Line AB is 26 ft, or the first option.