Question

resolve into factors 9-(a+x)²l​

Answer 1

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• Resolve into factors (or factorise) $9 - {(a + x)}^{2}$

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$9 - {(a + x)}^{2}$

$= {(3)}^{2} - {(a + x)}^{2}$

Now, we know that

${x}^{2} - {y}^{2} = (x + y)(x - y)$

So,

${(3)}^{2} - {(a + x)}^{2}$

$= (3 + a + x)(3 - a - x)$

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• $(3 + a + x)(3 - a - x)$