Answer:
The standard form of the quadratic equation is 
Step-by-step explanation:
we know that
The standard form of a quadratic equation is

we have

convert to standard form

2√20 and 4*5^1/2. Explanation Below:
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When we simplify 2√20, we get 4√5, and 5^1/2 is √5. Therefore, 4*5^1/2 is 4√5.
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Hope this helps!
D/2 + c/3
10/2 + 6/3
5+6/3
=5+2
=7