X2=x2+2x+9
x2-x2=2x+9
2x+9=0
2x=-9
x=-9/2
You use pi in the equation to find the circumference and/or area of a circle.
Answer:
X=7.9
Y=7.9
Step-by-step explanation:
We have that x=y
And form Pythagoras theorem we have

So x = y = 7.9
Answer:
x = ± 10
Step-by-step explanation:
- 5x² = - 500 ( divide both sides by - 5 )
x² = 100 ( take square root of both sides )
x = ±
= ± 10
That is x = - 10 or x = 10