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OpenStudy (anonymous):
When the quadratic equation y = (x − 5)(2x + 3) is written in standard form, what is the value of the coefficient "b"?
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myininaya (myininaya):
y=(x-5)(2x+3)=x(2x)+x(3)-5(2x)-5(3) =2x^2+3x-10x-15 =2x^2-7x-15 =ax^2+bx+c b=-7
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