JuniorBud JuniorBud

25-06-2019
Mathematics

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Can someone help me please

Can someone help me please class=

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Аноним Аноним

25-06-2019

Answer:

B. x = -5 +/- √30.

Step-by-step explanation:

2x^2 + 20x = 10

2(x^2 + 10x) = 10

2[ (x + 5)^2 - 25 ] =10

2(x + 5)^2 - 50 = 10

2(x + 5)^2 = 60

(x + 5)^2 = 30

x + 5 = +/- √30

x = -5 +/- √30.

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