3 years ago

Which of these is a controllable risk factor of disease

1 answer:

6 0

High blood pressure, unhealthy lifestyle,

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mash [69]

Answer:

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

Explanation:

$(3x + 7)(3x + 7)$

$= > {(3x + 7)}^{2}$

Using the algebric identity ${(a + b)}^{2} = {a}^{2} + {b + 2ab}^{2}$

So,

${(3x + 7)}^{2} = {(3x)}^{2} + {(7) }^{2} + 2 \times 3x \times 7$

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

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