Answer:
-5.457875
Step-by-step explanation:
Area=base*height
A=(x+6)(2x+2)
A=2(x+1)(x+6) technically this is the simplified form, but they may want the expanded form...
A=2x^2+14x+12
set them equal to their sum. which in this case is 141 then solve for x and plug it into your original equation to get your answer.
Answer:
Step-by-step explanation:
(-6+12i)-(7-19i)=
-6+12i-7+19i=
-13+31i
(b)