Easy
differnce of 2 perfect squares
a²-b²=(a+b)(a-b)
in this case
x⁴=(x²)²
16=4²
(x²)²-4²=(x²+4)(x²-4)
x²-4 can be factored since 4=2²
x²-2²=(x+2)(x-2)
complete factored form is
(x²+4)(x+2)(x-2)
gegroup to seperate (x+2)
(x+2)[(x²+4)(x-2)]
(x+2)p(x)
p(x)=(x²+4)(x-2)
expanded
p(x)=x³-2x²+4x-8
Y=5/4x-4
5/4 is the slope but to pass through the point it needs to cross the y axis at -4
0.5 times 16 equals 8 so that’s 276 messages 0.5 to get 40 cents is 8 more so 276 messages in all I hope I did this right
Answer:
2(2)+3(-3)=
4-9=
-5
Step-by-step explanation: