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

User Thew
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2 Answers

5 votes
The value and the answer is m = -2
User CakeMaster
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3 votes


▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ { \huge \mathfrak{Answer}}▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪

let's solve :

first step : we have to expand the term in L.H.S


  • (x + 3)(x - 5)

  • {x}^(2) - 5x + 3x - 15

  • {x}^(2) - 2x - 15

now, let's equate the equations to find the value of m :


  • {x}^(2) - 2x - 15 = {x}^(2) + mx - 15

value of m = -2

User Starsha
by
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