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PLEASE DO SOON!!! Use the quadratic formula to solve 5x2 + 8 + 1 = 0.

Match the letter of the equation to the step number. (need 5 steps)

PLEASE DO SOON!!! Use the quadratic formula to solve 5x2 + 8 + 1 = 0. Match the letter-example-1
User NinjaKC
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1 Answer

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(-8 (+)/(-) √(64-20) )/(10)Answer:

A -> H -> B -> E -> F

Explanation:

Equation for Quadratic Formula:


(-b (+)/(-) √(b^2-4ac) )/(2a)

a = 5, b = 8, c = 1

The following is letter A


(-8 (+)/(-) √(8^2-4(5)(1)) )/(2(5))

Next: Do basic arithmetic on the values

8^2 - 4(5)(1) = 64 - 20

2(5) = 10

Letter H ->


(-8 (+)/(-) √(64-20) )/(10)

Next: Subtract 64-20 in the square root of the numerator

Letter B ->


(-8 (+)/(-) √(44) )/(10)

Next: We see that
√(44) =
√((4)(11)) = 2√(11)

Letter E ->


(-8 (+)/(-) 2√(11) )/(10)

Lastly, multiply the top and bottom by 1/2

Letter F ->


(-4 (+)/(-) √(11) )/(5)

User Jmccartie
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