zanaplen27
zanaplen27 zanaplen27
  • 05-01-2019
  • Mathematics
contestada

Simplify the expression:
a.
b^2+49–(b–7)^2
b.
2a+6b)^2–24ab

Respuesta :

dthomasspates
dthomasspates dthomasspates
  • 05-01-2019
part a b2+49−(b−7)2

Distribute:

=b2+49+−b2+14b+−49

Combine Like Terms:

=b2+49+−b2+14b+−49

=(b2+−b2)+(14b)+(49+−49)

=14b

Answer:

=14b
part b

(2a+6b)2−24ab

Distribute:

=4a2+24ab+36b2+−24ab

Combine Like Terms:

=4a2+24ab+36b2+−24ab

=(4a2)+(24ab+−24ab)+(36b2)

=4a2+36b2

Answer:

=4a2+36b2


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