I don't understand these, I am suppose to Factoring the differences of squares.
1. x^2-49
2. -16 49h^2
3. 18a^4-72a^2
Please Help me I don't get it. These are my last couple of problems for this section.
1) (x-7)(x 7)
2) did you type that right?
3) below
18a^4 - 72a^2
18a^2 (a^2 - 4)
18a^2 (a-2) (a 2)
q2 rearrange the expression
49h^2 - 16
consider each term as a perfect square
(7h)^2 - 4^2
now you have "The Difference of Two Squares"
factor as in q1... the sum times the difference
"In mathematics you don't understand things. You just get used to them."
John Von Neumann
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