x
2
=
20
square root both sides
x
=
±
√
20
x
=
2
√
5
or
x
=
−
2
x
=
±
√
20
Explanation:
Initial equation
x
2
−
20
=
0
Add
20
on both sides
x
2
=
20
Add a square root to both sides
√
x
2
=
±
√
20
Simplify
x
=
±
√
20
Hope that makes sense!
Step-by-step explanation:
Answer:
13 is answer
Step-by-step explanation:
hope it helps
<span>In mathematics, a percentage is a number in the fraction of 100. It is often denoted with the symbol of "%", or simply "pct" or "percent". For example, 35% is equivalent to 0.35 or 35/100. The calculator above can take any two values and calculate the third value.</span>
Your answer is 7.36766294653
Answer:-9
Step-by-step explanation: