1.x2+3x+3=0
2.x2-2x-3=0
3.x2-6x+9=0
4.-x2+3=0

Step-by-step explanation:

the two A's in the buttom is correct

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Step-by-step explanation:

We use a rule of three:

Central angle             Area

360°                            

                              x

Where =pAB and x is the circular area.

What we need is x, so we solve the rule of three:

We use this formula to find the circular area of any central angle given when we have the angle and the radius.