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McGraw Hill Integrated II, 2012

MH

McGraw Hill Integrated II, 2012 View details

1. Solving Quadratic Equations by Factoring

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Exercise 90 Page 177

Begin by substituting 2a for a and 2b for b into the expression and then write it in terms of c.

D

Practice makes perfect

Let's substitute 2a for a and 2b for b into the expression and then write it in terms of c.

8a^3/b

a= 2a, b= 2b

8( 2a)^3/2b

Calculate power

8(8a^3)/2b

Multiply

64a^3/2b

a/b=.a /2./.b /2.

32a^3/b

Factor out 4

48a^3/b

8a^3/b= c

4 c

As a result c is multiplied by 4 and the correct option is D.

Subchapter links

Exercises p.174-177