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2 years ago

Quiz: Completing the Square 7 Solving Quadratic Equations

Mathematics

1 answer:

galina1969 [7]2 years ago

7 0

Answer:

Step-by-step explanation:

x²-5x=12

x²-5x+(\frac{-5}{2})²=12+(frac{-5}{2})²

$(x-\frac{5}{2} )^2=12+\frac{25}{4} =\frac{73}{4} \\x=\frac{5}{2} \pm\frac{\sqrt{73} }{2}=2.5 \pm 4.272\\x\approx 6.772,-1.772\\\\x \approx 06.77,-1.77$

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