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04-05-2020
Mathematics

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solve x²-10x-20=0 using completing the square

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amanda76542 amanda76542

04-05-2020

Answer:x=5+-sq45

Step-by-step explanation:

X^2-10x-20=0

-10/2=-5^2=25

x^2-10x+25=20+25

(x-5)^2=45

sq(x-5)= x-5

x-5=+-sq45

x=5+-sq45

sq= squareroot symbol

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