The expression 4x^2 + bx - 45, where b is a constant, can be rewritten as (hx + k) (x + j), where...

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Bluebook Digital SAT Test 4 Module 2 (Hard) Question 15:

The expression 4x^2 + bx - 45, where b is a constant, can be rewritten as (hx + k) (x + j), where h, k, and j are integer constants. Which of the following must be an integer?

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Your videos are saving me. The last set of questions tripped me up for this module. Thanks bro.

thevanquisher
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I love you, thank you for all these amazing vids.

birbasgitarist
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Is this the quickest route? I’m worried about timing :/

dr.perruche
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can we not just replace 45 as -kj, then divide it by k, leaving us with -j, which we know is a constant integer?

oops
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What would be the simplest way to do this?

RazorBlaze
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What category of dsat math problems does this fall into? i want to check out more on the question bank lol

ritgong