9th Grade Algebra

Algebra 9th grade:

Find the difference of two polynomials.

(–7x² + 12) – (8 – x²)

Solution:Step 1:Open the parentheses.

( –7x² + 12) – (8 – x²) = –7x² + 12 – 8 + x².

Step 2:Group like terms.

= (–7x² + x²) + (12 – 8)

More on:

Introduction to indices

Factors of 45

= –6x² + 4