A. f(x) = x2 - 11x - 12
B. f(x) = x2 - 4x -12
C. f(x) = x2+x-12
D. f(x) = x2-x-12
Match each quadratic function given in factored form
with its equivalent standard form listed on the left.
f(x) = (x + 2)(x-6)
f(x) = (x - 4)(x+3)
f(x) = (x – 12)(x + 1)
f(x) = (x – 3)(x +4)

Given: ab ≅ cd and ad ≅ bc prove: abcd is a parallelogram. statements reasons 1. ab ≅ cd; ad ≅ bc 1. given 2. ac ≅ ac 2. reflexive property 3. △adc ≅ △cba 3. ? 4. ∠dac ≅ ∠bca; ∠acd ≅ ∠cab 4. cpctc 5. ∠dac and ∠bca are alt. int. ∠s; ∠acd and ∠cab are alt. int. ∠s 5. definition of alternate interior angles 6. ab ∥ cd; ad ∥ bc 6. converse of the alternate interior angles theorem 7. abcd is a parallelogram 7. definition of parallelogram what is the missing reason in step 3? triangle angle sum theorem sas congruency theorem sss congruency theorem cpctc