Polynomials and Factoring Flashcards
6 cards from real Algebra Test practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 Polynomials and Factoring flashcards as text
Simplify: (3x² + 2x - 1) + (x² - 4x + 5).
Answer: 4x² - 2x + 4
Combine like terms: (3+1)x² + (2-4)x + (-1+5) = 4x² - 2x + 4.
What is the degree of the polynomial 5x⁴ - 3x² + 7x - 2?
Answer: 4
The degree is the highest power of the variable, which is 4.
Multiply: (x + 3)(x - 2).
Answer: x² + x - 6
Use FOIL: x² - 2x + 3x - 6 = x² + x - 6.
Factor out the GCF: 6x³ + 9x².
Answer: 3x²(2x + 3)
The GCF of 6x³ and 9x² is 3x², giving 3x²(2x + 3).
Expand: (2x + 1)².
Answer: 4x² + 4x + 1
Using (a + b)² = a² + 2ab + b²: (2x)² + 2(2x)(1) + 1² = 4x² + 4x + 1.
A polynomial with exactly 3 terms is called a:
Answer: Trinomial
A trinomial is a polynomial with exactly three terms.