
Home > CAAC > Chapter 13 > Lesson 13.RE2-S > Problem 2-135
2-135.
Try substituting numbers for x and simplifying each expression. 0 and 1 can give different results, so check them as well as other numbers.
These two expressions are not equivalent. (But if you had only used 0 you might have thought they were).
Multiply and simplify.
These two expressions are equivalent.
See part (a).
Remember that (x + 4)2 means (x + 4)(x + 4) and multiply.
These two expressions are equivalent.
Simplify the first expression and compare. Be sure you read the hint in part (b).
Try substituting numbers for a and b.