header bg

Question:

Simplify: \(\left(\right.7y^{2}+3xy-9\left.\right)-\left(\right.2y^{2}+3xy-5\left.\right)\)

A \(5y^{2}-4\)
Explaination

When subtracting polynomials the first step is to distribute the negative sign through the parentheses. This changes the sign on each term inside the parentheses: \(7y^{2}+3xy-9-2y^{2}-3xy+5\) Arrange like terms next to each other (optional): \(7y^{2}-2y^{2}+3xy-3xy-9+5\) Combine like terms to compute the answer: \(5y^{2}-4\)