The first step for deriving the quadratic formula from the quadratic equation, 0 = ax^2 + bx + c, is shown. Step 1: –c = ax^2 + bx

Which best explains or justifies Step 1?

subtraction property of equality
completing the square
factoring out the constant
zero property of multiplication

Write the expression in complete factored form. 5n_(c - 3) - n(c - 3) =

Given: ae ≅ ce ; de ≅ be prove: abcd is a parallelogram. we have that ab || dc. by a similar argument used to prove that △aeb ≅ △ced, we can show that △ ≅ △ceb by. so, ∠cad ≅ ∠ by cpctc. therefore, ad || bc by the converse of the theorem. since both pair of opposite sides are parallel, quadrilateral abcd is a parallelogram.

Gabrielle's age is two times mikhail's age. the sum of their ages is 84. what is mikhail's age?