$\"\"$

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The expression is $\"\"$ .

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In this trinomial, $\"\"$ . Since c is positive and b is positive, you need two positive factors with a sum of 17 and a product of 42.

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Make an organized list of the factors of 42, and look for the pair of factors with a sum of 17.

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$\"\"$

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Factoring: $\"\"$ when $\"\"$ .

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$\"\"$

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$\"\"$ . (Substitute: $\"\"$ ) $\"\"$

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Check:

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$\"\"$

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$\"\"$ (Write the sum of two products)

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$\"\"$ (Apply distributive property: $\"\"$ )

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$\"\"$ (Multiply: $\"\"$ )

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$\"\"$ (Apply distributive property: $\"\"$ )

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$\"\"$ (Multiply: $\"\"$ )

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$\"\"$ (Add: $\"\"$ )

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Therefore, the trinomial has been factored correctly.

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$\"\"$

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The factors of $\"\"$ is $\"\"$ .