alicezacharias1
alicezacharias1 alicezacharias1
  • 08-07-2021
  • Mathematics
contestada

if a rectangle has am area of 2x²+11x+15, what would be an expression for the length, and for the width?

Respuesta :

princessesther2011
princessesther2011 princessesther2011
  • 15-07-2021

Answer:

Length = 2x + 5

Width = x + 3

Step-by-step explanation:

Area of rectangle = length × width

Expression for area of the rectangle = 2x² + 11x + 15

Factorising the quadratic expression

2x² + 11x + 15 = 2x² + 6x + 5x + 15 = (2x² + 6x) + (5x + 15) = 2x(x + 3) +5(x + 3) = (2x + 5)(x + 3)

Length = 2x + 5

Width = x + 3

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