Factoring with a^2 – b^2 = (a-b)(a+b)

Question 1.
$64{ y }^{ 2 }\quad -\quad 9{ a }^{ 2 }$

Question 2.
$4{ a }^{ 2 }\quad -\quad 25{ b }^{ 2 }$

Question 3.
$16{ y }^{ 4 }-1$

Question 4.
${ (a+2) }^{ 2 }\quad -\quad { 6 }^{ 2 }$

Question 5.
${ (3\quad +\quad 6) }^{ 2 }\quad -\quad { (2\quad -\quad 9) }^{ 2 }$

Question 6.
$4x\quad -\quad 9x{ y }^{ 2 }$

Question 7.
${ x }^{ 2 }{ y }^{ 3 }\quad -\quad 16{ x }^{ 4 }y$

Question 8.
$3\quad -\quad 12{ x }^{ 2 }$

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