Find f(x)=3x^2 at x=3

27

Step-by-step explanation:

f(x)=3x^2    x = 3

f(3) = 3(3)^2 = 3 * 9 = 27

δabc ≅ δdcb by sas because

db ≅ ac . . given (side)

bc ≅ bc . . reflexive property (side)

∠dbc ≅ ∠ acb . . alternate interior angles where transversal bc crosses parallel lines bd and ac (included angle)