Question

2502 - 20ab + 4b2 =
Ya quiero el resultado

Answer 1

Respuesta:

25a

2

−(4b

2

−28bc+49c

2

) splitting middle term,

=25a

2

−[4b

2

−14bc−14bc+49c

2

]

=25a

2

−[2b(2b−7c)−7c(2b−7c)]

=25a

2

−(2b−7c)

2

=(5a)

2

−(2b−7c)

2

=(5a+2b−7c)(5a−2b+7c).

solution