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VladimirAG [237]
2 years ago
6

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

Mathematics
2 answers:
Fudgin [204]2 years ago
6 0
The value and the answer is m = -2
katovenus [111]2 years ago
3 0

▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ { \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

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