Mathematics, 06.04.2020 22:26 yasmimyamamoto2015

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If (ax + 3)(bx + 5) = 35x2 + kx + 15 for all values of x, and a + b = 12, what are the two possible values for k?
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If (ax + 3)(bx + 5) = 35x2 + kx + 15 for all val...