Mathematics, 10.10.2021 22:30 mophillips20202

If (x+3)(x-5)=x^2 +mx-15, the value of m is...?
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If (x+3)(x-5)=x^2 +mx-15, the value of m is...? Pls explain the answer, thx!

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If (x+3)(x-5)=x^2 +mx-15, the value of m is...?
Pls explain the answer, thx!