9x^2+42x+49 #160;Break the middle term,= gt; 9x^2+ 21x+21x+49 = gt; 3x(3x+7)+7(3x+7) Required factor,= gt; (3x+7)(3x+7) ...

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Zeros of a Polynomial

Solve 9 x 2...

Question

Solve $9 x^{2} + 42 x + 49$

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Solution

$9 x^{2} + 42 x + 49$

Break the middle term,
=> $9 x^{2} + 21 x + 21 x + 49$
=> $3 x (3 x + 7) + 7 (3 x + 7)$
Required factor,
=> $(3 x + 7) (3 x + 7)$

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