plisa91 plisa91
  • 03-05-2017
  • Mathematics
contestada

Simplify -7x(4+7x)-8(2-4x)

Respuesta :

JahanR
JahanR JahanR
  • 03-05-2017
-28x-49x-16+32x
-77x-16+32x
-45x-16
Answer Link
joytoy4859
joytoy4859 joytoy4859
  • 03-05-2017
8x-49^2-16
because -7x(4+7x) is broken down to 
-7x*4 = -28x
and
-7x*7x= -49x^2 the square root is because x*x= x^2
then you do the second part which is
-8(2-4x) and again you break it down
-8*2=-16
-8*-4x=36x
so now you have 
-28x-49x^2-16+36x
and when you simplify you get 
8x-49^2-16
Answer Link

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