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Mathematics, 03.10.2019 05:30 pr173418

If (ax - 4)(bx + 7) = 10xsquared + cx – 28
for all values of x, and a + b = 7, then
there are two possible values of c.
what is one of those two possible values of c ?

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If (ax - 4)(bx + 7) = 10xsquared + cx – 28
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there...
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