3 years ago

0=x^2-20 can you solve using square root formula? Then by using quadratic formula?

1 answer:

8 0

Sqrt(x^2) = sqrt(20)

x = +2sqrt(5)
x = -2sqrt(5)

x1 = (- 0 + sqrt(0^2 - 4*1*(-20))) / (2*1)
X2 = (-0 - sqrt(0^2 - 4*1*(-20))) / (2*1)

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antiseptic1488 [7]

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Step-by-step explanation:

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3 years ago

Please show me the steps to solve this<br><br> 2n^2 = -144

Julli [10]

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Step-by-step explanation:

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3 years ago

Read 2 more answers

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maxonik [38]

First let's define variables:
r: reading
s: skimming
We write the system of equations that adapts to the problem:
r + s = 275
(15/10) r + (10/15) s = 355
We solve the system of equations:
r = 206
s = 69
Note: see attached image for system solution.
Answer:
Jayden had to skim 69 pages through