pleasehelpmemorethanks~~~~
1howmanyprimenumbersparetheresuchthat199p+1isaperfectsquare?
A0B1C2D4E8
2HOWMANYPAIRSOFREALNUMBERS(X,Y)SATISFYTHEEQUATION(X+Y)^2=(X+3)(Y-3)
A0B1C2D4Einfinitelymany
3Whatistheareaofthepolygonformedbyallpoints(x,y)intheplanesatisfyingtheinequality//x/-2/+//y/-2/