If the matrix a b b c is positive definite, then a must be positive

Math 01.095 — Basic Algebra II (Fall, 2014) Final Review Name: Section #: Date: __________________________ Instructions: Attempt each question. We will discuss them in our review class session. Simplify the expression. Write the result using positive exponents only. 2 5 xy 1) ( ) 6 1) _____________ x y Simplify the polynomial by combining like terms. 2) 9x 16x y 4 8y x + 6x + 204