### Home > CC4 > Chapter 7 > Lesson 7.1.3 > Problem 7-39

7-39.

Rewrite each of the following expressions in a simpler form. Homework Help ✎

a.

b.

c.

(3

*x*+ 4)(4*y*– 1)d.

(

*x*– 2)^{2}+ 2

Read Math Notes box in Lesson 1.3.1 on scientific notation.

6.6 × 10^{7}

Read Math Notes box in Lesson 1.3.2 to review the rules of exponents.

Multiply the all of the exponents in the parentheses by 3. Remember 3 = 3^{1}. In the numerator you have

( -3^{1 · 3} · *x*^{2 · 3}). In the denominator you will have *y*^{-2 · 3}.

Make sure final answer has no negative exponents.

-27*x*^{6}*y*^{6}

Use a generic rectangle.

Read Math Notes box in Lesson 3.2.5 for more help.

Remember (*x* − 2)² is equivalent to (*x* − 2)(*x* − 2).

See part (c) for more help.