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OpenStudy (anonymous):
When the quadratic equation y = (x - 4)(2x + 5) is written in standard form, what is the value of the coefficient "b"? Answer 2 3 -3 -20
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OpenStudy (nenadmatematika):
-3
OpenStudy (nenadmatematika):
multiply those two, and you'll get this form of the quadratic equation ax^2+bx+c, so your coefficient b is -3
OpenStudy (anonymous):
5x - 8x = -3x --> b = -3
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