CPM Homework Help : INT2 Problem 4-85

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4-85.

Factor each expression, if possible. Identify any special cases, such as a difference of squares or a perfect square trinomial.

$4 x ^ { 2 } - 49$
Hint (a):
This is a difference of squares.

$2x^2+11x+12$
Hint (b):
Use an area model and a Diamond Problem.
Answer (b):
$(2x+3)(x+4)$

$4x^2+25$
Answer (c):
Not factorable. Why?

$9x^2+6x+1$
Hint (d):
What is special about the first and third terms?

$xy−4y+2x−8$
Hint (e):
See part (b).

$x^4−16$
Hint (f):
See part (a).
Remember to factor completely.

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