Question

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Answer 1

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Answer 2

10).
$8ab {}^{2} - 18a {}^{3}$
$2a(b {}^{2} - 9a {}^{2} )$
$2a(b + 3a)(b - 3a)$

$12) \: \: \: 2 - 50x {}^{2}$

$2(1 - 25x {}^{2} )$

$2(1 + 5x)(1 - 5x)$


$14) \: \: \: \:( 3a + 5b) {}^{2} - 4c {}^{2}$

$( 3a + 5b - 4c)(3a + 5b + 4c)$


$16) \: \: \: 4a {}^{2} - 9b {}^{2} - 2a - 3b$
$(2a + 3b)(2a - 3b) - 2a - 3b$

$(2a + 3b)(2a - 3b) - (2a + 3b)$

$(2a + 3b)(2a - 3b - 1)$


$18 ) \: \: \: \: \: \: 4a {}^{2} - 4b {}^{2} + 4a + 1$
$\: \: \: 4a {}^{2} + 4a + 1 - 4b {}^{2}$

$(2a + 1) {}^{2} - 4b {}^{2}$

$(2a + 1 + 4b)(2a + 1 - 4b)$


$20) \: \: \: 108a {}^{2} - 3(b - c) {}^{2}$
$3(36a {}^{2} - (b - c) {}^{2} )$
$3(36a + b - c)(36a - b + c)$



$22) \: \: \: x {}^{2} + y {}^{2} - z {}^{2} - 2xy$

$x {}^{2} + y {}^{2} - 2xy - z {}^{2}$

$(x - y) {}^{2} - z {}^{2}$

$(x - y + z)(x - y - z)$



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