leighon
leighon leighon
  • 25-03-2021
  • Mathematics
contestada

Factorise, check by using multiplication a-7a+12​

Respuesta :

devishri1977
devishri1977 devishri1977
  • 26-03-2021

Answer:

Step-by-step explanation:

Sum = -7

Product = 12

Factors = (-3) ; (-4)   { (-3) * (-4) = 12  and (-3) + (-4) = -7}

a² - 7a + 12 = a² -3a    - 4a + (-3)(-4)

                 = a(a - 3) - 4(a - 3)

                 = (a - 3)(a - 4)

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